Probably forums I use to solve problems (stackoverflow and all the stack exchange ones), offline games, guides (for programming, sysadmin, building tables, cooking, travel and repair ones…), documentation for every software and tool I use or might use. Wikipedia is also a must, music too. I have a media server for my music but keeping it up to date with every release is hard work that I haven’t started (yet).
I hope this one will get less attention or at least do « everything right ». No promoting hacking, no vending stuff and all, so that it stays alive despite any Nintendo attempts to kill it.
The universe is so big there must be life somewhere else. I’m also wondering is there is any more dimensions (4th dimension and upward), where there would be life that we can’t interact with…