pngweasel 1.0 - Конвертер изображений в PNG, создание частей из фонов изображений
  79 KB | Mac OS X or later | Freeware

pngweasel is our second fun little Mac OS X utility we put together to handle a common web developer's task: converting an image to the PNG image format and making parts of the image's background transparent.

Now of course you can do these things with most graphics applications - applications that take a while to load and learn, cost money, and most importantly, do not have any weasels.

Here then enters pngweasel. It's free, it's lightweight, it's easy to use, and yes, there is a weasel involved.