Sometimes VirtualDub2 for clipping, stitching, video filters.
I typically use FFmpeg directly on the command line, along with shell and/or lua scripts (in conjuncture with mpv), but sometimes I still use VirtualDub, which let's me serve/pipe frames directly to the any external binary, like ffmpeg, so it all ends up being the same tools interfacing with each other to combine their feature-sets.
I particularly like how fast it starts up and responds, along with how easy it is to customize the hotkeys and encoders.
I do my edits, hit the export to external encoder key, and select the profile (command line parameter set) I want ffmpeg to use.