Today shagkur and wntrmute have released DevKitPPC rev18 and libogc 1.8.0 along with libfat 1.0.5.
DevKitPPC is a port of the GNU Compiler Collection (GCC) and includes a C (gcc) and C++ compiler (g++), a debugger (gdb) and associated utilities, with the architecture "powerpc-eabi".
To quote: Beta9 would have been out a few days ago, but then Nintendo came up with the new October 23 %1# with perfect timing, so we had to make sure the beta9 installer was compatible (read: exploited a new bug nobody knew about until then).