I was surprised to find there is no single topic dedicated to locating all of the current community improvement mods to the default MSFS aircraft so decided it would help me (and hopefully others) to locate all of the available community improvements mods and compile them in one thread. If you have any to add please comment below as I very well may have missed some of them!
Airbus A320:
https://flybywiresim.com/a32nx
Airbus H135 Helicopter:
https://flightsim.to/file/8970/airbus-h135-helicopter-project
Boeing 747:
Boeing 787:
Bonanza G36:
Cessna 152:
https://github.com/JPLogistics/MSFS_C152
Cessna 172:
https://flightsim.to/file/40194/cessna-172sp-skyhawk-as1000-improvement
https://flightsim.to/file/12387/cessna-172-bush-kit
https://flightsim.to/file/12978/cessna-172-tail-dragger
https://flightsim.to/file/15805/cessna-172-amphibian
Cessna 182T:
Cessna C208:
Citation CJ4:
https://github.com/Working-Title-MSFS-Mods/fspackages/releases
Citation Logitude
https://flightsim.to/file/3655/asobo-cessna-citation-longitude-flight-dynamics-modifications-project-version-1-0
Diamond DA40:
https://flightsim.to/file/2738/da40-ngx-project
Diamond DA62X:
https://flightsim.to/file/2733/da62x-project
Diamond HK36TC:
https://flightsim.to/file/7568/wip-diamond-hk36tc-super-dimona
Discus 2b Glider:
https://flightsim.to/file/6768/discus-2b-glider
DR 400 Dauphin:
https://www.msfsaddons.org/aircraft/dr400-140b
EA-7 Edgley Optica:
https://flightsim.to/file/12731/ea-7-edgley-optica
Extra 33LT X:
https://flightsim.to/file/2767/extra-330lt-x
F/A-18E:
https://flightsim.to/file/23760/f-a-18-super-warrior
Icon A5:
https://flightsim.to/file/6806/icon-a5-high-performance-mod
King Air 350:
https://flightsim.to/file/14952/king-air-350i-improvement-mod-jd
Lockheed Martin F-22A Raptor:
https://flightsim.to/file/16413/lockheed-martin-f-22a-raptor-top-mach-studios-freeware-edition
Savage Carbon:
https://flightsim.to/file/3723/savage-carbon-stol-realism-mod
TBM 930:
X Cub:
Bush League Legends - X Cub
G1000:
G3000:
GNS530: