highly robust video editing, color correction, visual effects, motion graphics and audio post production. there is a high learning curve for all the features, but it is 100% free to use. It is insane what you can do with this progam.
KDenLive - [Win,Mac,Linux]
free & open source non-linear video editor. all the same things as Davinci Resolve but is 100% open source and privacy focused, more lightweight and easier on older systems. Still a bit of a learning curve but better user interface and easier than Davinci.
OpenShot - [Win,Mac,Linux,ChromeOS]
free & open source video editor. it has basic but unlimted editing features and trasnsitions that is simple and easy to use, quick to learn, and surprisingly powerful.
ShotCut - [Win,Mac,Linux]
free & open source video editor. it has basic but unlimted editing features and trasnsitions that is simple and easy to use, quick to learn.
free & open source video fx editor. featured pack vfx editor and focuses around that. i know its not really a video editor, but if you are looking to do a litle more that the basics from the options above this is a great addition.