Google Open Source - All of Googles open source projects under a single umbrella
Iceberger - Draw an iceberg and see how it will float
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
The Bored Hoard - Sieve the web for cool websites you probably never knew existed. Supporting the smaller independent sites that Google ignores. All revealed in a weekly box delivered online every Friday.
Open Source @IFTTT - A collection of IFTTT OSS projects.
Stickman Builder - Free parametric graphic Stickman Builder, creates fascinating stick figures on the fly.