btp2p stands for Bluetooth p2p and it is a collection of java classes for p2p networks over Bluetooth. Useful for CLDC multiplayer games and other applications with extendable design for layered protocols. HuNt is a chatroom midlet based on btp2p.
BTLib package is a J2ME Bluetooth library usefull when developing applications for Java, Bluetooth enabled mobile devices. The other packages are individual applications utilizing BTLib. You can download any of them and run it in your mobile device.