Kerbal Space Program
2,278 Mods
MechJeb2
4M DownloadsAutopilot, Information displays, and general Automation plugin
Kerbal Attachment System (KAS)
2M DownloadsKAS introduce new gameplay mechanics by adding winches and eva attachable struts/pipes.
Kerbal Engineer Redux
2M DownloadsKerbal Engineer reveals important statistics about your ship and its orbit during building and flight.
Kerbal Inventory System (KIS)
1M DownloadsKIS introduce new gameplay mechanics by adding a brand new inventory sytem and EVA usables items as tools.
B9 Aerospace 5.2.8
754k DownloadsEssential and enormous set of structural, control, propulsion, command and utility parts for aerospace designs.
[1.1.3] Astronomer's Visual Pack - BEYOND KERBAL
664k DownloadsAuroras, UHD clouds, sand storms, lightning, HD particle textures, sun flare, high altitude clouds, and much more... All bodies now carry an extremely different mood to them and are very pleasing to explore and look at.
Kerbal Alarm Clock
549k DownloadsThe Kerbal Alarm Clock is a plugin that allows you to create reminder alarms at future periods to help you manage your flights and not warp past important times.
BDArmoryContinued
447k DownloadsThe Original Weapons Mod by BahamutoD, continued!
SCANsat
406k DownloadsSCANsat: Real Scanning, Real Science, Warp Speed!
Chatterer
362k DownloadsA plugin for Kerbal Space Program which adds some SSTV, beeps, and nonsensical radio chatter between your crewed command pods and Mission Control. There is also some environmental sounds as : wind in atmosphere, breathing on EVA and background noises insid
TAC Life Support
347k DownloadsA life support system from Thunder Aerospace Corporation (TAC).
KSP Recall
345k DownloadsKSP Recall - a bag of tricks and stunts to overcome KSP blunders and borks.
Station Science
326k DownloadsNew science experiments and lab modules; give your space stations purpose!
Near Future Exploration
276k DownloadsNew probe and communication parts
BDArmory Weapons Extension
251k DownloadsNext Star Industries Nuclear and Heavy Weapons
Easy Vessel Switch (EVS)
227k DownloadsMakes switching vessels easy and predictable
Community Tech Tree
223k DownloadsExpanded tech tree for KSP
MechJeb Embedded Universal
195k DownloadsMechJeb Embedded with ModuleManager it Gives MechJeb Functionality to every command module, even from mods! Version Independent (should be :P) Career mode supported
USI Kolonization Systems (MKS/OKS)
160k DownloadsOrbital and planetary bases and colonies for KSP!
Transfer Window Planner
132k DownloadsAn in-game implementation of AluxMun's Launch Window Planner WebApp - to plan when to make planetary transfers