Use GIMP

AKVIS NatureArt is an image editor that gives you access to plenty of visual effects to apply...

AKVIS Charcoal is an image editor that provides you with an easy way to transform your favorite pictures into stunning works...

ASCII-art plug-in for Photoshop, GIMP and many other programmes Perfect for making ASCII...

AKVIS Draw can give your photographs an artistic appearance by making them look...

The primary download link for this listing is the native build...

Exiv2 is a cross-platform C++ library and a command line utility to manage image...

SupremePaint Lite is a fully functional image editor capable of editing almost any kind of image...

The Unidentified Flying Raw (UFRaw) is a utility to read and manipulate raw images from digital...

Drawpile is a collaborative drawing program that allows multiple users to sketch on the same canvas simultaneously...

Seashore is an open source tool designed to provide users with a flexible and feature rich platform for editing...

GimpPainter can be used for many tasks, including painting, erasing, blurring, airbrushing, inking and special...

GnuPG itself is a commandline tool without any graphical...