tinyCampaign is a simple and lightweight newsletter system.
Multi user address book application accessable through the web.
Ream-C is a console-based full screen mail client
HEML is an open source markup language for building responsive email
Bypass e-mail host attachment blockers.
Simple, web-based address & phone book
Roundcube plugin to create client-side e-mail filtering.
A Free form-data to Email platform for anyone to use.
A program to send mail via SMTP from command line
An extensible desktop mail app built on the modern web
Open source DMARC implementation
Lets you access Gmail using low badwidth...
mapSoN is a challenge/response spam filter for Unix
Class EnviaMail la cual envia E-mails!
Bunch of useful filters for AngularJS with no external dependencies!
Secure mail + Tor gateway