Rad Inks Print Suite is a Web application that allows you to interact with your clients online. It can be used to share documents, negotiate prices, submit and review proofs, and for many other tasks associated with printing. Its features include an online business card designer applet and an easy-to-use file uploader.
Credence is a tool for combating spam and pollution in filesharing networks. It lets you vote on files in the network, analyzes the votes of your peers so that you can avoid polluted files, and automatically identifies the voters in the network that are most credible and useful. It is built as an extension to LimeWire, running on the Gnutella filesharing network.