Adding a few more: - DragonRuby - I don't know if it should count separately form MacRuby - There were at least 5 Ruby-to-JavaScript compilers I remember from

Adding a few more: - DragonRuby - I don't know if it should count separately form MacRuby - There were at least 5 Ruby-to-JavaScript compilers I remember from about 10 years ago, but they are very hard to find. Surprisingly, one of them - ruby2js - is still alive and actively developed!