Alternatives to KNode for all platforms with any license

Thunderbird

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

Free Open Source Mac Windows Linux BSD PortableApps.com ... Haiku
Built-in RSS reader Extensible by Plugins/Extensions Extensible by Plugins/Extensions Built-in Calendar ... Calendar integration Categories Customizable Extensible by Plugins/Extensions Free API Gmail integration Google Calendar integration Import from Google Reader Support for IMAP Integrated Chat Integrated Web Browser Multiple Account support Export to OPML Import feeds from OPML POP3 Support Portable SMTP integration Tabbed interface Support for Themes Add a feature

1757 Like
- Thunderbird is capable of fetching and sending from/to Usenet groups. Not that comfortable as Knode but it works. spacepengu • Apr 2016
Microsoft Office Outlook

Part of the Microsoft Office Suite, Outlook is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.

Commercial Mac OS X Windows Web Android iPhone ... Android Tablet Windows Phone iPad Apple Watch Android Wear
Built-in Calendar Dark theme Signature with image Add a feature

311 Like
Microsoft Mail and Calendar

Windows 10 has Mail and Calendar apps already built in. With the Mail application you can now easily see all message from your...

Free Windows Windows S
Email tracking Bundled with Windows Add a feature

18 Like
iRedMail

A fully fledged, free email server solution, an open source project (GPL v2). Use official binary packages from Linux/BSD distributions, with both i386 and x86_64...

Free Open Source Linux BSD Self-Hosted
No features added Add a feature

16 Like
nPOPuk

nPOPuk is an ultra-small, but comprehensive, e-mail client that runs on a wide range of Windows-based operating systems

Free Open Source Windows Windows Mobile
POP3 Support Portable Add a feature

9 Like
- Discontinued The project seems to be no longer updated. Last version, 3.03, released in October 2014, can be still downloaded from the official website.
TrulyMail

TrulyMail is an email client and a private messaging system, very feature rich (voice recording, script blocking, etc.). Features: Spell checking in nine...

Free Windows
Portable Add a feature

3 Like
Pan

Pan is a newsreader, loosely based on Agent and Gravity, which attempts to be pleasant to use for new and advanced users alike. It has all the typical features found in...

Free Open Source Windows Linux
No features added Add a feature

9 Like