Revengeance is a community-made repackage of Tribes: Vengeance that patches the game to work on modern computers (Especially Win10), tweaks the HUD, and comes with a bunch of maps people play on for MP.

More info at https://tribesrevengeance.net/

Re-edit: A new website is up for Revengeance.

Can be used for speed runs?

It's what the other two runners used, so yes.