Punypng：在线无损图片压缩服务1+
620 views/ 2009.09.28 / 9:09 pm
Flash required. Supports PNG, JPG, GIF, Animated GIF (Max 500KB each)
Compress your PNG, JPEG, and GIF images
punypng is a free tool that dramatically reduces page load times by reducing the file size of an image without any loss of quality.
使用很简单，上传处理，下载即可。
[...] 使用很简单，上传处理，下载即可。(Via) [...]