Spoiler:Here's a weapon mod I've been working on, it's about 60% complete, it features fast fun weapons that are not too fiddly to use, all have an alternate fire and I have tried to use resources that are not overused.
The weapons:
Fist replacement - not done yet
Chainsaw replacement - not done yet
Pistol replacement - not done yet
Shotgun - classic blasting boomstick, features single and double fire modes
Nailgun - launch a flesh-ripping hail of nails at opponents, will rip straight through soft targets, alt fire to launch single nails.
Machinegun - unnacurate lead spitter, also has small grenade launcher attachment
Grenade Launcher - handy for getting those monsters just round that corner, also features an alt fire to launch sticky proximity mines, very useful weapon. Hilarious consequences.

Toaster - short range flamethrower, carbonises anything in its path, use alt fire to launch firey bombs which set the ground on fire.
Leech Beam - the next step in UAC energy weapon design, this beam does blistering damage and actually rips the life force from victims, giving it the the holder of the weapon, alt fire not done yet.
I have yet to do new ammo types, weapon/item sounds, custom deaths etc.
Also features ridiculous gibbage, don't use the kill monsters command on large maps!

Basically I am looking for suggestions for improvement and new features, because I am running out of ideas here

http://www.filefront.com/14417047/CTWEAPONMODTEST1.zip
(Oh yeah, needs the latest SVN)