Studlar has released a public beta application. This application is totally free, no strings attached, use it anyway you like.
Studlar Resizer will help you to convert a huge amount of pictures, resize them, rotate, colorize so you could for example upload smaller and cleaner pictures to Flickr® or any other such service.
This is a beta version, which means it is as good as feature complete for version 1.0, but it lacks quite a few things like an application icon, it has no icon.
If anyone wants to design an icon for the app, please let me know.
The future of this application is totally unsure. Depending on feedback, if you like the application let me know, let the good people on Macupdate.com know, rate it, send me comments.