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Kerbal Space Program
2,271 Mods
Near Future Aeronautics
239k DownloadsAdvanced aircraft engines and accessories
Easy Vessel Switch (EVS)
227k DownloadsMakes switching vessels easy and predictable
Feline Utility Rovers
217k DownloadsThis mod adds part for rovers. It includes also a laboratory and means to create articulated rovers
Community Tech Tree
210k DownloadsExpanded tech tree for KSP
Firespitter
199k DownloadsPropeller plane and helicopter parts
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
Kerbal Atomics
189k DownloadsAdditional nuclear engines for KSP
Cryogenic Engine Pack
184k DownloadsHigh Isp chemical rockets!
HotRockets! Particle FX Replacement
179k DownloadsHotRockets! Release for 1.0.4
Far Future Technologies
171k DownloadsOptimistic but generally viable future spacecraft technologies.
Stockalike Station Parts Expansion
163k DownloadsSpace station and surface base parts [just updated with more parts]
USI Kolonization Systems (MKS/OKS)
160k DownloadsOrbital and planetary bases and colonies for KSP!
For Science!
160k DownloadsYour science autopilot.
Realistic Atmospheres
148k DownloadsRemodeled atmospheres for all KSP celestial bodies.
Tarsier Space Technology Continued...
139k DownloadsSpace Telescopes with Galaxies and Rover Chemical analysis
(6S) Service Compartment Tubes (SCT)
138k DownloadsEver wanted to have smooth rockets without putting RCS tanks, batteries, mechjeb and whatnot on the top of the hull? Here’s a solution! And it is only 2 PARTS!!!
Unofficial B9 Aerospace REPACK
134k DownloadsMy "Unofficial" repack of B9 Aerospace that Just Works (TM)
Transfer Window Planner
132k DownloadsAn in-game implementation of AluxMun's Launch Window Planner WebApp - to plan when to make planetary transfers
Lazor System
132k DownloadsLazor System is an advanced targeting and guidance system with a lot of functions bundled in subsystems which can be activated by placing colored lazors on your vessel.
SpaceY Expanded (SYX) by NecroBones
120k DownloadsAn optional add-on for the SpaceY Heavy Lifters parts pack, adding 7.5m parts, engines, and other accesories.