NSV Lib is a cross platform C/C++ Library that let's you write and read everything in the NSV(Nullsoft Streaming Video) format. You can read existing files/streams, as well as write your own. And it contains very easy, yet powerful functions
Voodoo Exchange Networking Library is a D library that provides a simple API for creating streaming, peer-to-peer TCP connections between two clients, even if they are behind NATs or firewalls, by attempting multiple NAT traversal algorithms.