It's a full management app for recruiting companies.

There are still 3 companies that use it (since 2008), so their employees don't have a choice really. The app does a lot, so to stop using it the companies would need to hire and migrate to 3-4 other services. I reckon SAP and the kind could do everything as well, but these companies are too small for that.

There isn't a website or anything anymore for me to show, and I haven't been involved in it for over 10 years.

Quite common, lots of old software that is custom written lives on, be it java apps, old vb stuff, etc