So I'm a sucker for weapons-only mods that I can mix and match with monsters-only mods (especially Colorful Hell). I want to add more weapons-only mods to my mod library so I thought I'd ask the ZDoom community for more that I might have missed or forgot about. Right now I've got the following downloaded:
-Trailblazer
-High Noon Drifter
-Weapons of Saturn
-NecroDoom
Bonus points (but not required by any means) if said weapon mods have reloading. I'm a sucker for reloading.
I'd like to recommend The Trooper. It works great with monster add-ons, ketchup and the like. I consider it 'Russian Overkill Lite' - it makes vanilla maps a bit easy, but not trivial, and many of the weapons have a satisfying kick to them. The reloading/ammo switching system is a bit weird, and hard to get used to, especially if you play other mods.
Another great one is Metroid Dreadnought. The weapons have been replacement by various beam types, all of which have a regular and charged-up shot. You can fire missiles at will too.
There is also DoomRLA, which contains about a one hundred plus weapons into the game, every playthrough is different and your gameplay styles should match the class that you choose, the Monster addon is optional luckily. Heretical Doom is kinda like Brutal Heretic but without much of the 'brutalized' effects and so on, it also includes a reloading system but with a 'charge' like style into it. It's even compatible with monsters too.
Demon Steele (this is golden)
Super Chicken (...)
Heretical Doom (this one is recent)
Netronian Chaos (also recent, curretn version features only weapons but will have monsters in the future)
Psychic