Discovery mod is a full-scale expansion pack for Freelancer focused on continuing the story started in the vanilla campaign. The mod is used by some of the busiest multiplayer Freelancer servers and has multiplayer features including player owned (and built) bases, jumpdrives, cloaking devices and equipment manufacturing.
An excellent video which captures large fleet battles! - Massive fleets fighting each other for the upper hand in the Omicron sector.
Thanks to a community member; SeaFalcon for the wonderful depiction!