QNX

Developer tutorial,

https://www.qnx.com/developers/docs/7.1/

https://www.qnx.com/developers/docs/8.0/index.html

Community,

https://community.qnx.com/sf/sfmain/do/listProjects

Download

QNX 4.2

https://winworldpc.com/product/qnx/425