MiniQL is a small launcher for Quake 1, which happens to be my favourite game of all time. MiniQL can be used to launch mods and maps (like those you can obtain from Quaddicted) and can scan PAK files for individual maps (you normally need this for multi-map PAK files, like jams). It also provides a few other convenience options, like setting the skill level, video mode and engine/source port.
The latest version is 0.2c released in May 11, 2017. It is mostly a maintenance release but it should fix a couple of rare bugs with PAK files containing mixed case characters.