I really like the GIMP's transform widgets. They completely solve this common problem.
Currently there are scale widgets only, but there are some ideas from their UI team to provide refreshed widgets for rotation and skew too. http://gui.gimp.org/index.php/Transformation_tool_specification
I really like the GIMP's transform widgets. They completely solve this common problem. gui.gimp. org/index. php/Transformat ion_tool_ specification
Currently there are scale widgets only, but there are some ideas from their UI team to provide refreshed widgets for rotation and skew too.
http://