I was recently looking for (free) reverse engineering tools for Linux. On the
open source front, there's virtually nothing left that works on modern Linux
systems. Fenris, linice, and numerous others are all extinct. Without picking
up a copy of IDA, you're left with gdb or zero.
This is pretty frustrating. I haven't seen any tools built on the new utrace API, but perhaps it will make
gdb that much better...