CFR0.52 刚发布，linux下使用，需要编译，包含用代码，和使用说明。-CFR0.52 just released, linux use, the need to compile, including the use of code, and use.

crf++，很好用的crf工具。.53版本，包含说明文档和源码，以及应用实例-crf++, very good tool to use the crf. .53 Version, including documentation and source code, and application examples