Try GIMP For Ubuntu & instantly have the ability to edit and manipulate almost any image format with Photoshop-like features and plugins.
Download & Install Krita on your Ubuntu or Linux and experience a great Photo Editor that rivals Photoshop.
Download & Install Fotoxx on your Ubuntu or Linux and experience a powerful Image Editor that rivals Photoshop. Maybe.
Download the best Photoshop apps for Ubuntu for free. We also have screenshots and features for you to compare.