8 Upvotes
Offen A fair alternative to common web analytics tools
Ecosia The tree-planting search engine
Kweri - Discontinued Quick questions that may drive you crazy.
Rorschach Test - Discontinued Learn more about your personality.
President Flip Flops Going back on your word, one step at a time
Erwin - Discontinued I send knotty riddles and clues to solve them.