Online Multiplayer Plugin Only, unlike the one above I'd really like to control all packets and not have automatic sending. That way, I can control all of the behaviors myself and say I wanted to make a large-scale server I could have the packets sent out to different parts, if you know what i mean, but that doesn't matter as much as just putting in all the packets.
Encryption Plugin For encrypting messages, it would be really nice to have a really good method of encryption, so maybe blowfish?
DirectInput So this one could be really cool.. If we could use DirectInput to use controls on a game, then people who have controls could use them in game. (Ex. A rock band drumset being used in a game, like a remake of a Rockband sort of thing.)
Keypress simulator Could be interesting for simulating keypresses, such as doing keyboard macros on the computer. It would work really well for making some sort of multitask program or something.