Kerbal Space Program
2,277 Mods
Utility and Navigation
Miscellaneous
Science
Parts Pack
Propulsion
Structural and Aerodynamic
Gameplay
Resources
Command and Control
Ship Systems
Sub-Assembly
Physics
Twitch Integration
Solaris Hypernautics
41.5k DownloadsTotal set of parts from nuclear reactors to magnetic cooling to virtual particle technology to KSP!
Solar Science (SOL) by Snoopy20111
41.5k DownloadsA small addon that adds a couple new scientific instruments to do science around Kerbol (plus some flags).
GN drive
39.5k DownloadsGN drive from Mobile Suit Gundam 00
SpaceX Exploration Expansion (LEE) by LazTek
38.9k Downloads12-piece add-on planetary exploration parts pack for the SpaceX Launch Pack that includes advanced engines, a habitat, fuel tanks and fairings.
- Rocket Factory -
38.4k Downloadsthis MOD has many command pods with up to 11 crew. Moreover, new fuel tanks, many solar-panel and high performance engines.
Grounded - Modular Vehicles
37.4k DownloadsMakes it possible to make cars, trucks, vans as how you want them with modular parts.
Ven's Part Revamp
36.4k DownloadsA part pack aims to replace most of the stock parts in the game.
Deep Space Surface Habitat Unit Pack
35.4k DownloadsOuter-space deployable habitat parts pack
SpaceX Interplanetary Transportation System by Thrimm Aerospace
35k DownloadsSpaceX ITS as presented by Elon Musk on September 2016
Kerbonov Parts Pack
33.9k DownloadsSeveral parts, including some cockpits with IVA views.
SC Panzer Parts
33.6k DownloadsA BDA-using pack for building tanks and other fun stuff.
Radial Engine Mounts by PanaTee Parts International (PPI)
31.6k DownloadsA set of radially attached mounting points for increased flexibility with stack-only parts. Including decoupling and fuel crossfeed functionality.
ProbesPlus!
31.1k DownloadsStockalike-ish probe and science parts pack
WarpPrime Weaponry
31k DownloadsA weaponry addon for KSP
Impossible Innovations
30.7k DownloadsThis is an addon I’ve made for KSP that adds some unrealistic parts, useful for proof-of-concept stuff. There are some realistic, and handy parts too. I’m open to suggestions, and I’ll be happy to hear any advice you might have, as this is my first addon.
Modular Rocket Systems LITE
30.3k DownloadsReduced version of MRS, containing only the more unique/interesting half of the parts.
North Kerbin Dynamic Renewed
27.6k DownloadsA mod that add nukes to the base kerbal space program experience
Universal Storage 1.0 (for KSP 1.0)
27.2k DownloadsUniversal Storage provides modular resource storage for Stock KSP as well as add-on packs for KAS, TAC, ECLSS and others!
SpaceX Historic Archive (LHA) by LazarusLuan
27.1k DownloadsA 9-piece,parts pack for the SpaceX Launch Pack that includes the original DragonRider concept capsule and associated parts.
Large Boat Parts Pack
26.7k DownloadsA less parts, less laggy, shipbuilding experience