Gem 偶然搜到了个很 cool 的东西，rhodes -- ruby 开发跨平台 mobile 应用
https://github.com/rhomobile/rhodes
The Rhodes framework is a platform for building locally executing, device-optimized mobile applications for all major smartphone devices.
之前专门搜罗了 ruby 的移动开发方案，数量挺多，能上台面的貌似主要就是 rubymotion 了。欢迎大家交流补充和更新： http://blog.hickwu.com/posts/312