#5750
Adobe Substance 3D Sampler (the successor of Substance Alchemist) is a very excellent 3D material/texture production and management software, developed by Allegorithmic from France, which was acquired by Adobe in 2019. It builds on Substance Alchemist and makes the process of creating materials much easier.

#5738
Materialize is an amazing free image to material conversion tool, developed by Bounding Box Software. It can quickly and easily generate high-quality tileable 3D materials for use in game development. With it, you can create an entire material from a single image or import the texture map you have and generate any other texture map you need.