So a few have been well-established for a long time:
Omninet = Internet. Which was actually a godsend when it came, because in-story we had space dreadnaughts before the internet. And it was actually kind of clever for it to evolve out of the Omnisent and their stated goal of free information.
A few others:
TunaPages = Various social media. (Including Tuna Instant Messenger, or TIM, a popular messaging app which will never die.)
NuTube = Youtube? This was a throwaway comment from Mike in an OOC discussion, but I have no problem making it canon
Any other common/useful ones?