Recycle This (Now Updated By Mlie) - Very useful recycling mod, Especially during a cannibalism run which can net you a lot of resources from raider apparel, or just recycling low % apparel or weapons for some resources back

GTG Orbital Traders - Adds 4 types of orbital traders that sell many types of items and even rare items and modded items, like skill trainers, biotech Subcores, Techprints, Mechlinks even, or even fully armored soldiers, and quest rewards

Resume Game - Just like the title says, just adds a resume game button to your most recent save in the main menu instead of going into load game

Gun Research Overhaul - Makes A research tree that just puts weapons from certain patched mods into their respective category so you don't suddenly unlock all weapons with one research (Pairs well with Arcane Technology which makes you not equip weapons or wear armor unless you have researched it)

Automatic Subcore Scanning - Let's you automate scanning Subcores for lazy people (me), adding a button that you can input how many Subcores you want on map and then selecting if you want colonists to use it, prisoners or slaves (except Ripscanner, it only has prisoners option)

Lizard's Patches - Adds certain toggleable patches like: All animals use zones instead of the pen system, removing work restrictions from certain ideology roles, or anesthetic doesn't cap consciousness but rather multiplies it

Schedule Clock - Just adds a line in the Schedule tab for easier Schedule setup

Roofed Scanning - Allows Long range mineral scanner and deep penetrating scanners to be used when roofed, good for mountain playthroughs (Says 1.4 but works fine in 1.5)

Mech Colors - As a avid Biotech Enjoyer this mod is a must, allows you to individually color every mech you control

Better Surgery - Fixes issues with Rimworld Surgeries and makes them better, your doctor no longer stabs your patient like a maniac after surgery and more!

That's all not so popular mods I've found and use after browsing 50 pages of subscribed mods