I've yet to try it, but I have heard good things of the Eclipse C
Development Tooling (CDT).  I have no idea about how easy it is to
set up, but it seems like it uses gdb as a back end.

    www.eclipse.org/cdt/

Brian.

-- 
  Brian de Alwis | Software Practices Lab | UBC | http://www.cs.ubc.ca/~bsd/
      "Amusement to an observing mind is study." - Benjamin Disraeli