Our team worked for 1,000 days to create and open-source a web user analytics platform. It is a lightweight (~5 dependencies), “low-tech” PHP/PostgreSQL software that answers the question of what logged-in users are doing on your web application and helps mitigate some risks.

Online demo: https://play.tirreno.com Source code: https://github.com/TirrenoTechnologies/tirreno Official website: https://www.tirreno.com

If that's not of interest, there's also a game by @KilledByAPixel: https://play.tirreno.com/game, which has some sentimental flavour.

Dedication: thanks to my dad, who brought an 8086 home.