itch.io

Provides tools that let you customize characters with either free form sliders or combinations of pre-made options.

Contains lesbian, gay, bisexual, and/or transgender characters or plot lines.

Focused on using its text, moreso than its visuals or audio, to tell the bulk of its story/plot. (Still can have great audio and visuals, though!)

Twine is a free and open source tool for telling interactive, non-linear stories.