The GNU Image Manipulation Program (GIMP) is the most famous open-source alternative to Photoshop.
A dedicated dialog to fine-tune selection borders, allowing you to adjust smoothness, feathering, and contrast in one place. adobe photoshop cs3 version 100 free
Can't Re-Activate Photoshop CS3 [CS3 is dead] - Adobe Community The GNU Image Manipulation Program (GIMP) is the