Radiant is video surveillance software for large scale deployments - the only reason it exists is because open source VMS sucks and corporate VMS is extortionately priced, insecure and equally as dogshit.
Read hereA game engine written completely from scratch (C++) suing VS2019, supports nVidia and Intel graphics acceleration as well as CPU rendering. The engine is designed around non-Euclid geometry as well as seamless warping. Intel processor is required to work. AMD GPU is not supported.
Nex - AKA Network EXchange, is originally CDN software, but has grown into a federating file system with real time collaboration, git and granular access control. Nex is designed to handle confidential information
IRC-S but on crack - Treat it like IRC but with features of Discord/Teamspeak/[your_favourite_chat_application_here] and using imgui and Radiant's Portal protocols. Text, voice, video, files, all the shit and self-hosted. Written in C++ with WebAssembly plugin support. Instances (servers) can talk to each other too. Can be treated as teamspeak with unlimited seats.
ChatGPT but specifically taught to analyze/generate code in C++ yet for some reason it works better on Java, probably because of the explicit syntax.