Unretiner 是一款为iOS开发者准备的软件。可以方便迅速的进行图片的大小调整。

支持.png .jpg .tiff and .bmp等格式的文件。

Unretiner v1.0.2 Mac OS X | 1 MB

The best tool for iOS developers to easily resize their @2x or -hd cocos2d images! Supports .png .jpg .tiff and .bmp. To use simply select the @2x or -hd named images or an folder containing the images, use the global hotkey and you are done!