Vvvv - vvvv is a graphical programming environment for easy prototyping and development.
Roundcube - Web-based IMAP email client
Processing - C++ and Java programming at the speed of thought.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
Vuo - Design and build live interactive media.
Mailpile - Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.