1)   Seamless Texture Generator 1.361
Seamless Texture Generator is a tool for creating high-quality seamlessly tileable images from photographs quickly and easily. STG will save you hours of work. It makes most textures seamless with a single click!

 2)   Seamless Texture Creator 2.20
Seamless Texture Creator is a easy-to-use tool for creating seamless-tileable textures from existing images. Normally you don't have to change any settings, Seamless Texture Creator will create the seamless texture with just a single click!

 3)   PixPlant 1.2
PixPlant is a smart texturing tool that creates high quality seamless textures from plain photos.