Neo Textures is a free and open source software that uses nodes and procedural data to create tillable image textures and displacement maps.
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Neo Textures editor is a free and open source project available on SourceForge.
Pro Powerful control on procedural nodes
Can easily modify all of the multipliers and alligorithm values of procedural generation.
Con No longer being developed
Neo Textures is no longer being developed. The project seems to be abandoned.