It happens that I’m very interested in procedurally generated content.
I’m currently gathering free content generators, I can use with my current project Kelgar and future projects.
I want to share this list with you: http://kelgardev.forumieren.org/h2-tools
May it help developing your projects
Also, feel free to suggest other content generators. I will add only ones to the list which work for me, though, that means they either need to run in browser or under Linux.