Genetica Viewer is a free seamless texture rendering application. It comes with hundreds of royalty-free textures of various types, all perfectly seamless and ready to go at resolutions up to 3, 000 x 3, 000!
The Wood Workshop is a free seamless texture editor that specializes in the creation of seamless wood textures. It comes with a collection of over 100 preset wood textures, all perfectly seamless and ready to go at resolutions up to 3000 x 3000!
Seamless textures editor featuring flexible node-based system that allows all elements of a texture to be edited and rearranged in any desired order. Textures are automatically seamless. Over 200 preset textures and texture components are included.