Do you have a game or application that's deployed on Windows and do you need to make frequent updates to your product? Check out the Darkmoon Labs binary difference patcher.

It's built on the WISP multi-player networking APIs and is free to use in your projects. We include the patch generator, server and client files needed to get you going. Here is the documentation and download link:

No strings attached. Enjoy.

http://www.darkmoonlabs.com/darkmoon-labs-binary-difference-patcher