itch.io

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

Contains lesbian, gay, bisexual, and/or transgender characters or plot lines. Expanded to include queer, intersex and agender identities.

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.