Blender: Blender is a free and open source 3d computer graphic software.
It consist of many powerful features like 3d modeling, texturing, lighting, rigging, skinning, fluid, smoke, particle, sulpting and animating it event has camera tracking, video editing and compositing with powerful node editor were you dont have to worry about after effect.
It also has a built-in game engine.
If you are a new beginner and want to try out a 3d software this is probably the best for you cause its an open-source and is available for free. You can get it free from Blender official site.www.blender.org
COLOR VIBRANCE Plug-in
Color Vibrance Plug-in for After Effect: Intense bright colorization can be tricky so Video Copilot created a plug-in that makes it easy to achieve HOT colors instantly. Plus it’s FREE!
We even added some helpful matte tools so you can generate alpha channels from stock footage like SHOCKWAVE and give you more compositing control. www.videocopilot.net
Add Hot Colorization with ease
Create Alpha Channels (unmultiply)
Works on Pre-Matted Clips
Eliminate the faded colors when using mask feathering
15 Free sci fi alpha/height panels
Sci-Fi brush and alpha sample set for Quixel and Substance painter, 15 brushes and height/alpha maps, all 2048x2048.
The full version for this set contains 300+ alphas as well as tutorials on how to customize and make your own custom alphas, you can find the full set at - gumroad.com
Free for Commercial Use
These brushes can be used for any program that works with alphas and height maps, you can add to 3Dcoat, mudbox, substance painter etc.