G'day all! As we near the release of Doom (2016), which is just a week from now, I have been working hard to put the finishing touches on my version of the Super Shotgun Launcher (SSGL). SSGL is a cross-platform, modern app, built on top of Angular and NW.js which enables you to easily manage your WADs, PK3s, and playlists for classic Doom.
It supports zDoom, gzDoom, DoomRPG, Doom64EX and Zandronum, as well as Oblige, which is an awesome tool that can randomly generate (sensible) maps. You can create ordered lists of WADs/PK3s, and save them for quick access. It will also grab screenshots for (most) WADs based on their MD5 checksum, from wad-archive.com.