This is my personal opinion, however, it might be useful for players who have not yet discovered the richness the OXPs bring to the game.
NOTE: With 1.80, many of these are available as OXZ from the built-in Expansion Manager.
I recommend all new (or returning) players install at least some of the mods in the first section. The other mods are just my personal recommendations.
Bring Oolite into the 21st century
These are mostly cosmetic and should run on every machine capable of running vanilla Oolite.
Frontier Style Equipment NOTE: this is made by me so that you have complete clarity
(most of this falls into the 'why isn't it in the game itself?!' category)
Note: You know, those two HUDs can go together for 100% more enjoyment!
Zygo Cinematic Sky & Nebulas note: I recommend setting sky_n_stars to 10000 for performance reasons
Snoopers note: amazingly cool maps if used with BGS
Custom Shields note: I recommend setting this.customshieldsshieldtype to basic
Ooniverse (most of this falls into the 'why isn't it in the game itself?! category)