There's also an SDK Tools repository,which you get to by replacing "sdk" in the above line with "tools", if I recall correctly.

You can easily just install this stuff with apt-get, the problem is none of it is optified so it eats a healthy chunk of rootfs space. When I installed gcc and the like (before my last reflash, haven't gotten around to it since), I manually optified all the libs/binaries, but yeah. That part's a PITA.