NiceSlice v0.5 ALPHA – Slices terrain textures to 256×256 tiles. Similar to Slice60 in function only in fancy GUI form and a bit more flexable, but lower quality however.
FlyRawGui – Converts indexed bitmaps to RAW/ACT files and back.
Slice60 – Converts .TGA files to 64×64 tiles in RAW format.
Terragen Classic – Easy generation of realistic terrain.