Featuring the excellence of open source. These are the 10 best cross platform pieces of software that is freely available today. 
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*Obsidian is NOT open source. My apologies.
*Obsidian: https://obsidian.md/
OBS Studio: https://youtu.be/Muk9LfEWHeU
RStudio: https://youtu.be/SdMPh5uphO0
MPV: https://youtu.be/w-g04TLp0tg
OpenRGB: https://youtu.be/3KZQKYsQud0
Goverlay: https://youtu.be/IpsTHbGNUmU
Blender: https://youtu.be/JZIFWEY3l6k
QGIS: https://youtu.be/kCnNWyl9qSE
FreeCAD: https://youtu.be/u8otDF_C_fw
Inkscape: https://www.youtube.com/watch?v=-_KJZPOYBeA
Marktext: https://youtu.be/GJGpBw4bWFk
EasySSH: https://youtu.be/l4yeJ2zo92M

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My Workstation (PAID LINKS)
ASUS ROG M16: https://amzn.to/3t8Xgpo
DeepCool MATREXX 40: https://amzn.to/3q3K8Qn
AMD 3700x: https://amzn.to/31AKX9N
ASRock B550M: https://amzn.to/3qeymTv
G.Skill Trident Z Neo: https://amzn.to/3JRbeSF
Radeon RX 580: https://amzn.to/3n7Ax9g
Sceptre 32" QHD Monitor: https://amzn.to/3f39KGK
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00:00 - Introduction
00:35 - Obsidian
01:47 - INTOTHEAM
02:38 - OBS Studio
03:31 - RStudio
04:27 - MPV
05:00 - OpenRGB
05:50 - Goverlay
06:37 - Blender
07:00 - QGIS
08:07 - FreeCAD
08:57 - Inkscape
09:51 - BONUS