Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
PixelBlock - Block email open tracking inside of Gmail
Hermes - Pandora Client for OS X
Ugly Email for FireFox - Get back your email privacy, block email tracking
pianobar - “pianobar” is a free/open-source, console-based replacement for ...
Inbox When Ready - Protect your focus... hide your Gmail inbox by default