I wrote this paint program for myself a few months ago.
Similar to mspaint and mac paintbrush but with more features.
If someone wants to check it out, lemme know what you think.
GTK2 based. See README for compiling instructions.
Project website: https://launchpad.net/dibuja
From the README...
1. Features
- Drawing tools
Lines
Arrows
Rectangles
Ellipses
Pencil
Text
Brushes
Flood fill
Rounded rectangles
Polygon (closed polygonal chain)
Curves
Selection
- Selection (rectangular only)
Crop to selection
Use selection as brush
- Undo/Redo
- Zoom in/out
- Effects (uses gegl)
Grayscale
Invert
Insta Brannan (Instagram like effect)
Insta 1977 (Instagram like effect)
Brightness/contrast
Gauss blur
Posterize
Threshold
Vignette
Pixelize
...
- Editable color palette
- Image
Copy / Paste
Flip horz/vert
Rotate
Custom rotate
Resize
Scale
Paste from file
Desktop capture
- Antialiasing
- File Formats
Whatever gdk pixbuf loaders you have installed