Gate One is an HTML5-powered terminal emulator and SSH client
Open source source control management system for Mercurial and GIT with code-reviews, built in push/pull server, LDAP/AD, permissions system and full text search.
MiniGal is a series of dynamic PHP image galleries that aim to be simple, easy to use, good looking while still being free and open source.
A CalDAV Client for modern(ca. 2011) web browsers using a bit of html5 and a bunch of css3.