I used to work for the Free Software Foundation's GNU Project. The Project's goal is to produce the GNU operating system, a complete Unix-like operating system conformant to POSIX.1 and upward compatible with 4.4 BSD. Source code for the whole system will be freely available and copylefted so it stays free.

Here's what I was been doing at the GNU Project:

You can get the current releases of make, glibc, Emacs, and many other things from the canonical GNU distribution sites.

Brave souls can get the latest snapshots of the Hurd and C library directly from GNU development machines.