SIGERSHADERS
The Siger Studio's XSMP for 3ds Max is a continuation of well-known plugins family: V-Ray Material Presets Pro (VMPP), Corona Material Presets Pro (CMPP) and Material Repository Pro (MRP).
But at the same time it's a completely new software created from scratch. Therefore versions of the program are started over again from 1.0.0.
The idea of the software dates back to 2006 - the first free material manager written with MaxScript (had only a few free material libraries). The history of the commercial plugin began in 2009 (C# and MaxScript).
Nowadays - written in C# / C++ and has hundreds of material presets, fast and convenient material manager, material lab for testing your materials.
XSMPmax comes in several editions: Repo, Professional and Studio. Compare the features of each edition to select the one that meets your requirements.

https://www.sigerstudio.eu/