I like diving and filming and do with my camera a white balancing underwater. Although the results are great, the result is never 100% perfect, so i use VirtualDub with an Auto Levels plugin to correct the slightly off whitebalance. Virtualdub is not maintained anymore, so i am looking for a replacement. I know there is a white balance filter in Shotcut, but this one does it automatically and on average the effects are very good!
It would be great if it could be incorporate it in Shotcut. Luckely the souce of the plugin is still available at: http://eodvdf.narod.ru/Index.html