Is there a simple and easy app on Ubuntu to do some quick and dirty blocking of say... a license plate in a picture?
I'm hoping that I don't have to install anything, because it's going to long and painful if I do.
kolourpaint is a nice little image editor. It looks and feels quite similar to ms paint.
Try out MTPaint Paint for Linux on SourceForge.net It works nicely, also for manipulating small objects, my favorit MsPaint substitute on linux.