Voyager is a collection of parser-based text adventures for Windows, presented using the Flashpoint Launcher and packed with several interpreters to play them out of the box.

There are a little over 600 freely-distributed and abandonware adventures here, taken from lots of sources.
Adventures are double click to play, with all the difficult parts taken care of. Compatibility is not guaranteed but should still be high.
Install is easy; just run the executable, pick a directory, go to the new Voyager directory in that directory, and run the shortcut.

Version 0.3 (2024-02-26), "Spacebar Struck Twice", adds adventures from the Quest platform, updates some of the underlying software, and adds a few more games to the mix.

Download (1500MB)