I have license of older version of Adobe Photoshop, I don't really need much, just a few things I use for touching up images. I'm not into amateur digital photography that much anymore and for development environment, I migrated to Linux.
I've been meddling with GIMP, I couldn't quite figure it out yet. For now I'm looking for something equivalent to High-pass, which I used to use in combination with 'Soft light' blending to selectively sharpen images.
Any editor with similar filters available for Ubuntu/Linux?