开源的 Android Markdown 编辑器（GitHub: https://github.com/zeleven/mua）
OSCHINA 的 Android 客户端源码 ，可在 Google Play 或者国内几个应用市场上搜索“开源中国”来安装此app
Android图片处理工具类，包括： 图片查看、照片墙、bitmap转存、圆角、剪切、图片加载缓存、图片压缩等
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