We use VS Code to write CFML in. The best VS Code extension I've found is this one:
https://marketplace.visualstudio.com/items?itemName=KamasamaK.vscode-cfml but it' not perfect and hasn't been updated in over 2 years (so it's lacking some new tags / tag attributes). Other ones I've tried had various issues such as limited intelli-sense or poor auto-closing of tags - all of which seems to work really well in KamasamaK's extension.
Anyhow - what's everyone else's favorite and why? Any other CF VSC extensions other than just handling the markup anyone recommends?