Repository: https://github.com/GoVanguard/legionโ€‹

Legion is a great, easy-to-use, graphical user interface that automates certain initial recon tasks. It performs detailed nmap scans on the target(s), including (but not limited to) service detection and running operating systems. Additionally, it gathers known CVEs for detected services based on their version (though this usually doesn't work for "custom" services, like a ticket system running on some unsuaul port).

Great tool to get an initial idea of services running on boxes at HTB, but additional configuration is probably necessary if running a "real" scenario.