Free editing and compositing software
OpenShot is a cross-platform video editor, with support for Linux, Mac, and Windows. User-friendly. Level: easy
Da Vinci Resolve
Has a free version and a paid 'Studio' version which includes more features. Color correction and non-linear video editing (NLE) application for macOS, Windows, and Linux, originally developed by da Vinci Systems, and now developed by Blackmagic Design.
More advanced interface/learning curve. Level: intermediate/advanced