Bleeps Doom

Replace Doom sounds with bleeps! Doom actually has a full set of PC speaker sounds meant for computers without a proper sound card. Very few source ports have support for playing them (Chocolate Doom is one).
This mod replaces the digital sounds with rendered PC speaker sounds. This lets modern source ports like GZDoom play them. The experience isn't entirely accurate, but it is fun.

These mods work with GZDoom on any commercial Doom IWAD/FreeDoom.

Hi-Res Doom

Packages include 2x, 4x, and 8x high resolution pk3 mods for classic Doom (spritefixed), SmoothDoom, and FreeDoom. To be used with GZDoom.

SmoothDoom requires SmoothDoom 6/15/19 to be used with it.
Spritefixed includes Doom 2 Minor Sprite Fixing Project v1.9 already, stacking with it is not necessary.
FreeDoom is meant for FreeDoom 0.11.3.