Bukkit

Plugin:

• Fixed events
• Fixed server-client handshake (for reals)
• Fixed bug with GUI deserialization throwing errors (I had to redo how GUIs are serialized)
• Fixed bugz
• Made more bugs (see caveats)

This is actually approaching beta pretty quickly! All that I have to do is work on clientside events, dynamic GUIs, and GUI deserialization!

Note (for the javadoc): Thanks to the author of org.json for his/her javadocs. I didn't write those, and take no credit for their work.
Client:

• Client now sends key/mouse events to server
• Worked on Custom GUI deserialization (not finished)
• Generated source. If anyone wants it for some reason, PM me, and i'll upload it

For jar:

• Mostly untested. PLEASE tell me of any problems, to fix them.
• I really need to update to 1.7.4, as soon as MCForge does.
• I haven't added APIs for overlays or dynamic GUIs
• Server kicks you if you send too many events (highest priority to fix) for 'disconnect.spam'

...so a lot, but it kinda works sometimes, if you don't really care if it crashes before you download it. For client:

• Deserialization of GUIs isn't finished.
• I need to not send events in servers that don't have the plugin (not really a problem right now)
• I need to fix the duplicated keybinding glitch (no idea why it happens)
• I need to fix GUI deserialization (it *might* work, but it needs testing)
• Only sends a few events (click, key, button) to server. Will fix soon-ish