Ingress
I've hacked slightly on the 'IITC' Android app.
Ident & DNS daemons
There used to be a few bits of code I've put together, but now they've moved to their own, more universal, sites:
Both of these are for inclusion in talker/mud code to allow for asynchronous 'user' (RFC 1413) and DNS (PTR/reverse) lookups respectively.
Other Miscellanous bits of code