LinkLocker - LinkLocker is a lightweight bookmarking service with an emphasis on privacy.
Iceberger - Draw an iceberg and see how it will float
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
Stickman Builder - Free parametric graphic Stickman Builder, creates fascinating stick figures on the fly.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Drawy - Learn to draw, use camera to score your drawings