Spawns Zombies at a constant interval from a team's spawnpoints. Works really well with zf_dustbowl.
Simply compile with the command
spcomp zombie_horde.sp
and put the compiled .smx file in your "<modname>/addons/sourcemod/plugins"
directory.
The map you are on needs to have a nav mesh built if it is custom. I built one for zf_dustbowl_b4 which is included in this repo.