Sleek is a mini-client that connects to the Second Life main grid. It’s useful for situations where you want to be in-world, but don’t want to have the huge overhead of the graphics engine.
Currently, SLeek has the ability to send and receive chat, send and receive IMs, do people search, teleport, read inventory, write inventory (create and delete folders), follow avatars, and display LL’s web-based login page.