Which "underdog" vendor/protocol/technology have you used that you would like to share here (for free)?

Hello,

Hunting for unicorns today and I would like to start this thread for the betterment of mankind /networking.

An example: phpIPAM is a free opensource web UI tool that does what it says. the awesome part is that they have support for VRFs, allowing the same subnets to co-exist in the database.

https://phpipam.net/