The Platform Independent Language PIL now has its own website with a manual for the language and downloads of the compiler. You can use PIL as target for your domain-specific language and have it work on all PIL supported platforms. Currently only Java and Python are supported, but creation of PIL back-ends is cheap, probably much cheaper than making dedicated back-ends for your own DSL. You can get involved and contribute a new back-end for a new platform. To start we would like to have back-ends for PHP, C#, C, and Objective C, but any others are welcome too.