The following is a list of the mods (as an imgur album) for each of the Freelancers in Atlas Reactor. If you are looking for recommended builds, look here.
FIREPOWER:
Blackburn
Celeste
Elle
Gremolitions
Grey
Juno
Kaigin
Lockwood
Nev:3
Nix
Oz
PuP
Tol-Ren
Zuki
FRONTLINE:
Asana
Brynn
Garrison
Phaedra
Rampart (Rufflebucket)
Rask
Titus
SUPPORT: