dali

Came here to mention nim that I've followed with great interest. As it compiles to C you can probably use it just about everywhere. As far as android support this guy is working on adding support to android via Dalvik assembly. The usual approach to get nim to work with android would be JNI but that might cause problems for example with x86 android machines if I am not mistaken. https://github.com/akavel/dali

As mentioned in other comments, maybe worth to note that it's an assembler in a library form, i.e. without code for a parser. But then, looking at it in another way, it's a clever reuse of the C compiler's parser! Now, in a something of a "shameless plug", incidentally I took a very similar approach[1] recently, going for a "library form" too when writing an experimental assembler for Dalvik (i.e. Android VM) bytecode. Not having to write a parser helped me to iterate/prototype/hack faster! [1]: https://github.com/akavel/dali/blob/d79cec81293abc5f3a87f4d8...