WriteLab is a web tool that helps students practice their confidence in their writing. The founders are Donald McQuade, a professor of English at UC Berkeley, and Matthew Ramirez, a Phd student at UC Berkeley.
"I was finishing up a paper on Athanasius Kircher for my history of science class when I decided to run it by two of my housemates. When one of them read it, she flagged the following sentence. Kircher went on to publish over thirty works on subjects ranging from hieroglyphics to magnetism."