Comparison of feed aggregators

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Short description: Comparative list of RSS feed aggregators


The following is a comparison of RSS feed aggregators. Often e-mail programs and web browsers have the ability to display RSS feeds. They are listed here, too.

Many BitTorrent clients support RSS feeds for broadcasting (see Comparison of BitTorrent clients).

With the rise of cloud computing, some cloud based services offer feed aggregation. They are listed here as well.


Version 9.9.9

Release history

Client License First stable release Latest stable release
Date Version
Akregator GPL ? ?
Amarok GPL-2.0-or-later ? ?
AOL Explorer Proprietary June, 2005 1.0
Avant Proprietary August, 2004 ?
Awasu Proprietary February, 2003 1.0
BlogBridge GPL ? ?
Bloglines Proprietary ? ? Merged with NetVibes
Canto GPL-2.0-only January 14, 2009 0.6.0
Claws Mail GPL-3.0-or-later January, 2005 1.0.0
CommaFeed Apache-2.0 ? ?
Cooliris ? ? ? ?
Digg Reader Proprietary ? ? Discontinued on March 26, 2018
Feed Viewer Proprietary April, 2006 1.0 Windows 150.2.10 (August 10, 2021)
iOS 0.1.39 (August 10, 2021)
Feedbin MIT [1] March 12, 2013 ? (web site, continuous updates)
Feedly Proprietary 2008 ? (web site, continuous updates)
Feedreader Proprietary ? ?
Flipboard Proprietary ? ?
Flock Proprietary November 2, 2007 1.0
Gnus GPL-3.0-or-later February 1, 1988[2] ?
Google Reader Proprietary September 17, 2007 2.0 Discontinued on July 1, 2013[3]
HCL Notes[lower-alpha 1] Proprietary 1989 1.0
Inoreader Proprietary ? ? (web site, continuous updates)[4]
iTunes Proprietary freeware ? ?
Juice GPL-2.0-or-later ? ?
K-Meleon GPL November 26, 2000 0.2
Kazehakase GPL-2.0-or-later January 29, 2003 ?
Liferea GPL ? ?
Maxthon Proprietary September 8, 2005 1.0.0250
Windows6.1.2.3000 / September 24, 2021; 3 years ago (2021-09-24)[5]
Android6.0.2.3500 / December 9, 2021; 2 years ago (2021-12-09)[5]
Mac5.1.60 / August 27, 2018; 6 years ago (2018-08-27)[6]
iOS6.0.6 / December 14, 2021; 2 years ago (2021-12-14)[7]
Windows Phone2.2.0 / March 30, 2017; 7 years ago (2017-03-30)[8]
Linux1.0.5.3 / September 9, 2014; 10 years ago (2014-09-09)[9]
MediaMonkey Freemium ? ?
Microsoft Office Outlook Proprietary / Commercial software 1997 97 15.0.4517.1509 (January 29, 2013)
Mozilla Firefox MPL-2.0 September 23, 2002 0.1 Builtin RSS reader was removed in Version 64, Available as an add-on.[10][11][12]
Mozilla Thunderbird MPL-2.0 December 7, 2004 1.0
My Yahoo!   ? ? ?
NetNewsWire MIT [13] February 11, 2003 1.0
Netscape Browser Proprietary May 19, 2005 8.0 8.1.3 (April 2, 2007; 17 years ago (2007-04-02)) [±]
Netscape Navigator 9 Proprietary October 15, 2007 9.0 9.0.0.6 (February 20, 2008)
Netvibes Proprietary ? ? ?
News360 Proprietary November, 2010 ? ?
Newsbeuter MIT January 16, 2007 0.1
NewsBlur MIT [14] October 26, 2010 1.0 4.0
Newsboat MIT September 20, 2017 2.10
NewsFire Proprietary ? ? 2.0
OmniWeb Proprietary March 17, 1995 1.0
Opera Mail Proprietary December, 1996 2.1 1.0.1044[15] (February 16, 2016; 8 years ago (2016-02-16)) [±]
Pegasus Mail Proprietary, Donationware 1990 ?
Protopage Proprietary May, 2005 1.0 11.43 (December 2015)
Pulse ? ? ? ?
QuiteRSS GPL-3.0-or-later Dec, 2014 0.14.0
Rhythmbox GPL-2.0-or-later ? ?
RSS Bandit BSD-3-Clause March, 2003 1.0
RSS Guard GPL-3.0-only February 4, 2014 1.9.9.3
RSSOwl EPL-1.0 December 19, 2004 1.0
Safari Proprietary ? ?
Sage MPL-1.1 ? ? 1.5.5 (June 16, 2017)
Shiira BSD-3-Clause ? ?
Sleipnir Proprietary October, 2005 2.00
Windows (Sleipnir 6)

6.5.4 (December 19, 2023; 11 months ago (2023-12-19)[16])

Windows (Sleipnir 4)

4.8.4 (December 19, 2023; 11 months ago (2023-12-19)[17])

macOS

4.7.9 (March 2, 2021; 3 years ago (2021-03-02)[18])

iOS

4.14.2 (December 21, 2023; 11 months ago (2023-12-21)[19])

Android

3.7.3 (December 1, 2023; 11 months ago (2023-12-01)[20])

Songbird GPL ? ?
The Bat! Shareware March, 1998 1.00 Build 1310
The Old Reader Proprietary June 12, 2012[21] Beta Beta[22]
Tiny Tiny RSS GPL-3.0-or-later ? ? rolling releases, most recent February 2019[23]
Winamp Freemium ? ? 5.9.2 Build 10042[24] (April 26, 2023; 19 months ago (2023-04-26)) [±]


Windows Live Mail Proprietary ? ? 2012 (v16.4.3528.0331) (November 4, 2014; 10 years ago (2014-11-04)) [±]
Zimbra Zimbra licensing March, 2006 3.5
Zune Proprietary ? ? 4.08.2345 (August 22, 2011; 13 years ago (2011-08-22)) [±]
Client License Date Version Latest stable release
First stable release

Netscape Messenger 9 is a fork of Mozilla Thunderbird and has the same features.

Operating system support

Client Windows macOS Linux BSD Solaris Android iOS Other
Akregator No ? Yes Yes Yes No No No
Amarok Yes Yes Yes Yes Yes No No No
AOL Explorer Yes No No No No No No No
Avant Yes No No No No No No No
Awasu Yes No No No No No No No
BlogBridge Yes Yes Yes No No No No No
Canto No No Yes No No No No No
Claws Mail Yes Yes Yes Yes Yes No No Maemo
CommaFeed Yes Yes Yes Yes Yes Yes Yes Client side: every platform with a web browser
Server side: every platform with Java
Cooliris Yes Yes No No No No No No
Feed Viewer Yes No No No No No Yes Windows Phone dropped
Feedreader Yes No No No No No No No
Flock Yes Yes Yes Yes No No No No
Gnus Yes Yes Yes Yes Yes Yes No DOS
HCL Notes[lower-alpha 1] Yes Yes Yes No No No No No
Inoreader Yes Yes Yes No No Yes Yes No
Internet Explorer Included No No No No No No No
iTunes Yes as Podcasts app No No No No No No
Juice Yes Yes No No No No No No
K-Meleon Yes No No No No No No No
Kazehakase No No Yes Yes No No No No
Liferea No No Yes Yes No No No No
Apple Mail No Included No No No No No No
Maxthon Yes No No No No No No No
MediaMonkey Yes No No No No No No No
Microsoft Office Outlook Yes Yes No No No No No Windows Mobile
Mozilla Firefox Add-on Add-on Add-on Add-on No No No No
Mozilla Thunderbird Yes Yes Yes Yes No No No No
NetNewsWire No Yes No No No No Yes No
Netscape Browser Yes No No No No No No No
Netscape Navigator 9 Yes Yes Yes No No No No No
Newsbeuter No Yes Yes Yes No No No Source code available
NewsBlur Web based Web based Web based Web based Web based Yes Yes every platform with a web browser
Newsboat No Yes Yes Yes No No No Source code available
NewsFire No Yes No No No No No No
OmniWeb No Yes No No No No No No
Opera Mail Yes Yes Yes Yes[25] Dropped No No BeOS, QNX, OS/2
Pegasus Mail Yes No No No No No No No
Protopage Web based Web based Web based Web based Web based Dedicated Web App Dedicated Web App every platform with a Web browser
Pulse Web based Web based Web based Web based Web based Dedicated App Dedicated App every platform with a Web browser
QuiteRSS Yes Yes Yes No No No No Source code available
Rhythmbox No No Yes Yes Yes No No No
RSS Bandit Yes No No No No No No No
RSS Guard Yes Yes Yes Yes No No No Supports OS/2 starting with version 3.9.1.
RSSOwl Yes Yes Yes Yes Yes Yes No every platform with Java and SWT
Safari Yes Included No No No No No No
Sage Yes Yes Yes No No No No No
SeaMonkey Mail & Newsgroups Yes Yes Yes Yes No No No No
Shiira No Yes No No No No No No
Sleipnir Yes No No No No No No No
Songbird Yes Yes Yes No Yes No No No
The Bat! Yes No No No No No No No
The Old Reader Web based Web based Yes Web based Web based Multiple apps Multiple apps Windows Phone, Symbian, WebOS, Firefox OS
Tiny Tiny RSS Yes Yes Yes Yes Yes Yes Yes every platform with a web browser
Winamp Yes No Obsolete No No No No No
Windows Live Mail Yes No No No No No No No
Zimbra Yes Yes Yes Yes No No No No
Zune Yes No No No No No No Windows Mobile
Client Windows macOS Linux BSD Solaris Android iOS Other

Web feed and protocol support

Client feed URI scheme RSS 0.91 RSS 1.0 RSS 2.0 RSS enclosure MRSS Atom other format Delta updates IPv6 Auto updates HTTP Basic Auth
Akregator ? Yes Yes Yes Yes Yes Yes ? No Yes Yes Yes
Amarok ? ? Yes Yes Yes ? Yes ? No ? Yes ?
AOL Explorer ? ? ? ? ? ? Yes ? ? Yes ? ?
Avant ? ? ? ? ? ? Yes ? ? Yes ? ?
Awasu Yes Yes Yes Yes Yes Yes Yes any XML format (via XSL) ? Yes Yes ?
BlogBridge ? ? ? ? ? ? ? ? ? ? ? ?
Canto ? Yes Yes Yes Yes ? Yes ? ? ? Yes ?
Claws Mail ? No Yes Yes ? ? Yes ? No Yes Yes ?
CommaFeed Yes Yes Yes Yes Yes Yes Yes RSS 0.90,
RSS 0.92,
RSS 0.93,
RSS 0.94,
Atom 0.3,
Atom 1.0[26]
No Yes Yes No
Cooliris ? ? ? ? Yes Yes ? ? No ? ? ?
Feed Viewer ? Yes Yes Yes Yes Yes Yes CDF, RDF No Yes Yes ?
Feedreader Yes Yes Yes Yes Yes ? ? ? ? ? Yes ?
Flock Yes ? ? ? ? Yes Yes ? ? Yes Yes ?
Gnus ? Yes Yes Yes ? ? No Newsgroups ? Yes No ?
HCL Notes[lower-alpha 1] ? Yes Yes Yes ? ? Yes ? ? Yes ? ?
Internet Explorer No Yes Yes Yes Yes ? Yes Web Slice Yes Yes Yes ?
iTunes ? ? ? Yes Yes ? Yes ? No ? Yes ?
Juice ? ? ? ? Yes ? ? ? No ? ? ?
K-Meleon ? ? ? ? ? ? Yes ? ? Yes ? ?
Kazehakase ? ? ? ? ? ? ? LIRS, HINA-DI ? Yes ? ?
Liferea Yes Yes Yes Yes Yes Yes Yes ? Yes Yes[27] Yes ?
Mail (OS X) ? ? ? Yes ? ? Yes ? No Yes Yes ?
Maxthon ? ? ? ? ? ? Yes ? Yes Yes ? ?
MediaMonkey ? ? ? ? Yes ? ? ? ? ? ? ?
Microsoft Office Outlook ? Yes Yes Yes ? ? Yes ? Yes Yes Yes ?
Miro ? ? ? ? Yes Yes ? ? ? ? ? ?
Mozilla Firefox ? Add-on Add-on Add-on ? Add-on Add-on ? No Add-on Add-on ?
Mozilla Thunderbird ? Yes Yes Yes ? ? Yes Newsgroup No Yes Yes Yes
NetNewsWire Yes ? ? ? ? ? ? ? No ? ? No[28]
Netscape Browser ? ? ? ? ? ? Yes ? No Yes Yes ?
Netscape Navigator 9 ? ? ? ? ? ? Yes ? No Yes Yes ?
NewsBlur Yes Yes Yes Yes Yes Yes Yes RSS 0.90,
RSS 0.92,
RSS 0.93,
RSS 0.94,
Atom 0.3,
Atom 1.0
Yes Yes Yes ?
Newsboat ? Yes Yes Yes ? ? Yes ? ? Yes ? ?
NewsFire ? ? ? ? ? ? ? ? ? ? ? ?
OmniWeb ? ? ? ? ? ? Yes ? ? Yes ? ?
Opera Mail Yes Yes Yes Yes Yes Yes Yes RDF, Newsgroup ? Yes Yes ?
Pegasus Mail ? Yes Yes Yes ? ? ? ? ? ? ? ?
Protopage Yes Yes Yes Yes Yes Yes Yes RSS 0.90,
RSS 0.92,
RSS 0.93,
RSS 0.94,
Atom 0.3,
Atom 1.0
? Yes Yes ?
Pulse ? ? ? ? ? ? ? ? ? ? ? ?
Quiterss ? ? Yes Yes ? ? Yes ? ? ? Yes ?
Rhythmbox ? ? ? ? Yes ? ? ? No ? Yes ?
RSS Bandit ? ? ? ? ? ? ? ? No ? ? ?
RSS Guard Yes Yes Yes Yes Yes Yes Yes Gmail,
JSON feeds,
Inoreader,
Nextcloud News,
Feedly,
Tiny Tiny RSS,
FreshRSS,
other services via Google Reader API
Google Reader API,
Feedly,
Gmail
Yes Yes Yes
RSSOwl Yes Yes Yes Yes Yes Yes Yes Newsgroup No Yes Yes ?
Safari Yes ? Yes Yes ? ? Yes ? No Yes Yes ?
Sage ? Yes Yes Yes No No Yes ? ? Yes Yes ?
SeaMonkey Mail & Newsgroups ? Yes Yes Yes ? ? Yes Newsgroup ? Yes Yes ?
Songbird ? Yes Yes Yes Yes Yes Yes ? No Yes Yes ?
Shiira ? ? ? ? ? ? Yes ? ? Yes ? ?
Sleipnir ? ? ? ? ? ? Yes ? No Yes ? ?
The Bat! ? Yes Yes Yes ? ? Yes ? ? Yes ? ?
The Old Reader Yes ? ? Yes Yes ? Yes PubSubHubbub No Yes Yes ?
Tiny Tiny RSS ? ? ? Yes ? ? Yes ? No ? Yes ?
Winamp ? ? ? ? Yes ? ? ? ? Yes Notification only ?
Windows Live Mail ? Yes Yes Yes ? ? Yes ? Yes Yes Yes ?
Zimbra ? Yes Yes Yes ? ? Yes ? ? ? ? ?
Zune ? ? ? ? Yes ? ? ? ? ? ? ?
Client feed URI scheme RSS 0.91 RSS 1.0 RSS 2.0 RSS enclosure MRSS Atom other standard Delta updates IPv6 Auto updates HTTP Basic Auth

Interface and notes

Web browsers and Internet suites have for browser plugin a N/A, because they don't need it.

Client Pop-up Tray notification Browser plugin E-mail "newspaper"-like Media aggregator Notes Downloadable attachments
Akregator Yes Yes Yes (integration with konqueror) Yes ? Yes KDE ?
Amarok ? ? ? ? ? Yes KDE ?
AOL Explorer ? ? N/A ? ? ? Discontinued; Feed support is available in Internet Explorer 7 ?
Avant ? ? N/A ? ? ? Feed support is available in Internet Explorer 7 ?
Awasu Yes Yes N/A Yes Yes Yes Supports user-written plugins. Yes
BlogBridge ? ? ? ? ? ? ?
Canto ? ? ? ? ? ? Ncurses/console based reader ?
Claws Mail Yes Yes Yes Yes ? ? RSSyl plugin needed ?
CommaFeed ? ? Yes ? Yes ? Web browser ?
Cooliris ? ? Yes ? ? ? Web browser plugin ?
Feed Viewer No No N/A No Yes Yes No
Feedreader Yes No No ? Yes ? ?
Flock ? ? N/A ? ? Yes Discontinued ?
Gnus Add-on ? ? Yes ? ? Emacs-based mail and news client ?
HCL Notes[lower-alpha 1] ? ? ? ? ? ? Studio Blog Reader is one RSS reader application for IBM Lotus Notes;[29] Notes version 8.x introduced a native RSS reader ?
Internet Explorer ? ? N/A ? Yes ? Feed support is available in Internet Explorer 7 ?
iTunes ? ? ? ? ? Yes ?
Juice ? ? ? ? ? Yes Designed as Podcast aggregator ?
K-Meleon ? ? ? ? ? ? Web browser ?
Kazehakase ? ? N/A ? ? ? Web browser ?
Liferea Yes Yes ? ? ? ? ?
Mail (OS X) ? ? ? Yes ? ? ?
Maxthon ? ? N/A ? ? ? Web browser ?
MediaMonkey ? ? ? ? ? Yes Media Player ?
Microsoft Office Outlook ? ? ? ? ? ? Feed support is available in Microsoft Office Outlook 2007 ?
Miro ? ? ? ? ? Yes Media Player ?
Mozilla Firefox Add-on Add-on N/A ? ? ? Web Browser ?
Mozilla Thunderbird ? Add-on ? Yes No ? Mail Client ?
NetNewsWire ? ? ? ? ? ? ?
Netscape Browser ? ? N/A ? ? ? Discontinued; Web browser ?
Netscape Navigator 9 Yes ? N/A ? ? ? Discontinued ?
NewsBlur ? ? ? ? ? ? ?
Newsboat No No Yes ? ? ? Default browser can be configured in settings ?
NewsFire ? ? ? ? ? ? ?
OmniWeb ? ? ? ? ? ? Part of the OmniWeb browser ?
Opera Mail Yes Yes No Yes No ? Yes
Pegasus Mail ? ? ? Yes ? ? Pegasus Mail can convert RSS feeds to e-mails via free add-ons ?
Rhythmbox ? ? ? ? ? ? Media Player ?
RSS Bandit ? ? ? ? ? ? .NET Framework based ?
RSS Guard No Yes No Yes Yes Yes Qt-based, supports online feed/message synchronization via Tiny Tiny RSS, Nextcloud News, Inoreader and others. Supports plugins written in C++/Qt, custom message filters via JavaScript, tags/labels. Yes
RSSOwl Yes Yes No No Yes Yes no longer support for Google Reader synchronization since version 2.2.0 Yes
Safari ? ? N/A ? Yes ? Web Browser ?
Sage ? ? ? ? Yes ? a Firefox extension ?
SeaMonkey Mail & Newsgroups ? ? N/A Yes ? ? Part of the SeaMonkey Internet suite ?
Songbird ? ? ? ? ? Yes Media Player ?
Shiira ? ? N/A ? ? ? Web browser ?
Sleipnir ? ? N/A ? ? ? Feed support is available in Internet Explorer 7 ?
The Bat! ? ? ? Yes No No Mail client; rss2mail or rss2pop3 plugin needed for versions prior to 6.4; newer versions support RSS natively ?
The Old Reader ? ? Yes ? ? ? ?
Winamp No ? No No No Yes Media Player ?
Windows Live Mail ? ? ? Yes ? ? ?
Zimbra ? ? ? ? ? ? Groupware suite ?
Zune ? ? ? ? ? Yes Media player ?
Client Pop-up Tray notification Browser plugin E-mail "newspaper"-like Media aggregator Notes Downloadable attachments

Capabilities

Client Offline support Search Annotations News Filtering Pluginable Automatic Update Publish Capabilities
Akregator Yes Yes No Yes ? Yes No
Amarok ? ? ? ? ? ? ?
AOL Explorer ? ? ? ? ? ? ?
Avant ? ? ? ? ? ? ?
Awasu Yes Yes Yes Yes Yes Yes Yes
BlogBridge ? ? ? ? ? ? ?
Canto ? ? ? ? ? ? ?
Claws Mail ? ? ? ? ? ? ?
CommaFeed ? Yes ? ? ? Yes ?
Cooliris ? ? ? ? ? ? ?
Feed Viewer Yes Yes ? No No Yes Sharing
Feedreader Yes Yes ? ? ? Yes ?
Flock ? ? ? ? ? ? ?
Gnus Yes Yes ? ? ? Yes ?
HCL Notes[lower-alpha 1] ? ? ? ? ? ? ?
Internet Explorer ? ? ? ? ? ? ?
iTunes ? ? ? ? ? ? ?
Juice ? ? ? ? ? ? ?
K-Meleon ? ? ? ? ? ? ?
Kazehakase ? ? ? ? ? ? ?
Liferea Yes Yes ? Yes ? Yes ?
Mail (OS X) ? ? ? ? ? ? ?
Maxthon ? ? ? ? ? ? ?
MediaMonkey ? ? ? ? ? ? ?
Microsoft Office Outlook ? ? ? ? ? ? ?
Mozilla Firefox ? ? ? ? ? ? ?
Mozilla Thunderbird Yes Yes ? Yes ? Yes ?
NetNewsWire Yes Yes ? No ? ? ?
Netscape Browser ? ? ? ? ? ? ?
Netscape Navigator 9 ? ? ? ? ? ? ?
Newsbeuter Yes Yes Yes Yes Yes Yes No
NewsBlur Yes Yes Yes Yes ? ? Yes
Newsboat No Yes No ? ? Yes No
NewsFire ? ? ? ? ? ? ?
OmniWeb ? ? ? ? ? ? ?
Opera Mail Yes Yes ? Yes No Yes No
Pegasus Mail ? ? ? ? ? ? ?
QuiteRSS ? ? ? Yes ? ? ?
Rhythmbox ? ? ? ? ? ? ?
RSS Bandit ? ? ? ? ? ? ?
RSS Guard Yes Yes Yes Yes Yes Yes Supports "share-to-published" feature for Tiny Tiny RSS.,
Sending e-mails via Gmail.
RSSOwl No Yes ? Yes Yes Yes ?
Safari ? ? ? ? ? ? ?
Sage ? ? ? ? ? ? ?
SeaMonkey Mail & Newsgroups ? ? ? ? ? ? ?
Shiira ? ? ? ? ? ? ?
Sleipnir ? ? ? ? ? ? ?
Songbird ? ? ? ? ? ? ?
The Bat! Yes Yes Yes Yes Yes Yes Yes
The Old Reader Via some mobile apps Yes ? ? ? Yes Sharing
Tiny Tiny RSS Yes Yes Yes Yes Yes Yes Yes
Winamp ? ? ? ? ? ? ?
Windows Live Mail ? ? ? ? ? ? ?
Zimbra ? ? ? ? ? ? ?
Zune ? ? ? ? ? ? ?
Client Offline support Search Annotations News Filtering Pluginable Automatic Update Publish Capabilities

See also

Notes

  1. 1.0 1.1 1.2 1.3 1.4 Previously known as IBM Lotus Notes.

References

  1. "Feedbin License". https://github.com/feedbin/feedbin/blob/main/LICENSE.md. 
  2. "GNUS: a NNTP based news reader for GNU Emacs (1 of 2)". http://gnus.org/2.0/gnus.1. 
  3. "A second spring of cleaning". https://googleblog.blogspot.com/2013/03/a-second-spring-of-cleaning.html. 
  4. Inoreader. "Inoreader Change Log". Inoreader. http://www.inoreader.com/changelog. 
  5. 5.0 5.1 "Maxthon Release Note 6". Maxthon International. 24 September 2021. https://forum.maxthon.com/index.php?/release-notes6/. 
  6. "‎Maxthon Browser". 27 August 2018. https://apps.apple.com/app/id804619114. 
  7. "‎Maxthon Cloud Web Browser". 14 December 2021. https://apps.apple.com/app/id541052011. 
  8. "Maxthon Browser". 15 September 2014. https://www.microsoft.com/en-us/store/p/maxthon-browser/9wzdncrfj17t. 
  9. "Maxthon for Linux Changelog". Maxthon International. 9 September 2014. http://www.maxthon.com/linux/changelog/. 
  10. "Mozilla plans to remove RSS feed reader and Live Bookmarks support from Firefox - gHacks Tech News". July 25, 2018. https://www.ghacks.net/2018/07/25/mozilla-plans-to-remove-rss-feed-reader-and-live-bookmarks-support-from-firefox/. 
  11. "Firefox 64.0, See All New Features, Updates and Fixes" (in en-us). December 11, 2018. https://www.mozilla.org/en-US/firefox/64.0/releasenotes/. 
  12. "Feed reader replacements for Firefox" (in en-us). https://support.mozilla.org/en-US/kb/feed-reader-replacements-firefox. 
  13. "NetNewsWire License". https://github.com/brentsimmons/NetNewsWire/blob/master/LICENSE. 
  14. "NewsBlur License". https://github.com/samuelclay/NewsBlur/blob/master/LICENSE.md. 
  15. "Opera 12 and Opera Mail security update". 2016-02-16. https://www.opera.com/blogs/security/2016/02/opera-12-and-opera-mail-security-update/. 
  16. "リリースノート" (in ja). https://www.fenrir-inc.com/jp/sleipnir/note.html. Retrieved December 19, 2023. 
  17. "Sleipnir 4 for Windows - リリースノート" (in ja). https://www.fenrir-inc.com/jp/sleipnir/4/note.html. Retrieved December 19, 2023. 
  18. "「Sleipnir」をMac App Storeで" (in ja). https://apps.apple.com/jp/app/sleipnir/id475299388. Retrieved June 24, 2021. 
  19. "「Sleipnir Mobile」をApp Storeで" (in ja). https://apps.apple.com/jp/app/id404732112. Retrieved December 27, 2023. 
  20. "Sleipnir Mobile - Web Browser" (in en). https://play.google.com/store/apps/details?id=jp.co.fenrir.android.sleipnir. Retrieved December 15, 2023. 
  21. Elena Bulygina (12 June 2012). "Thank you note". The Old Reader blog. http://blog.theoldreader.com/post/24989224185/thank-you-note. 
  22. "The Old Reader". https://theoldreader.com/. 
  23. "tt-rss". https://git.tt-rss.org/fox/tt-rss. 
  24. "Winamp : Supported versions : Latest supported version". December 22, 2022. http://forums.winamp.com/showthread.php?t=265777. 
  25. "Download the Opera Browser for Computer, Phone, Tablet | Opera". http://www.opera.com/download/guide/?custom=yes. 
  26. "Welcome to ROME". https://rometools.jira.com/wiki/display/ROME/Home. 
  27. "Liferea / Re: [Liferea-devel plans for 0.6.1"]. https://sourceforge.net/p/liferea/mailman/message/4654140/. 
  28. "RFE: support for feeds behind HTTP auth". https://github.com/Ranchero-Software/NetNewsWire/issues/502. 
  29. "OpenNTF.org - Project snapshot: Studio Blog Reader". https://www.openntf.org/Projects/pmt.nsf/ProjectHome?ReadForm&Query=Studio%20Blog%20Reader. 

External links