Bitp.it
Bitp.it is an embedable Javascript Bitcoin Miner which creates a Distributed Miner through sending workunits to different browsers viewing a webpage.
Overview
To use Bitp.it, the user signs up on the homepage. They then are sent a customized javascript script to embed in the <head> section of their webpage. This then uses the browser of users viewing the webpage as a CPU Miner, pooling the distributed resources to earn Bitcoins through Slush's Pool.
History
The project was announced on the Bitcoin Forum on May 20, 2011 by 1bitc0inplz, one of the lead developers.
The project, met with resounding approval, soon gained a better UI and more features such as an overview of the performance of all sites, the ability to change your wallet, and a view of the current balance.