Add ProtoTwin to README.md (#3232)

README.md

@@ -562,6 +562,13 @@ malfunctioning robots, ancient secrets, and an implacable, power-hungry foe.
 
 ![Primordia Title](https://assets.nintendo.com/image/upload/c_limit,f_auto,h_1000,q_auto,w_1700/v1/ncom/en_US/games/switch/p/primordia-switch/Video/posters/Primordia_Trailer)
 
+## ProtoTwin
+
+https://prototwin.com - Online industrial simulation software for manufacturing and material handling.
+
+![ProtoTwin - Simulation for Industrial Automation](https://github.com/bkaradzic/bgfx/assets/37254625/7aac600f-2687-468f-8d60-441c45ec14a3)
+
+
 [License (BSD 2-clause)](https://bkaradzic.github.io/bgfx/license.html)
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