Small App for fun - Golang and SQLite with as little external libs as possible.
Full stack: either rails or Remix + Prisma depending on how much CRUD I plan on doing.
Kate or VS Code for the editor
Git for version control
Diet Coke for beverage
In all seriousness, I use to work on a large web app written in C and it was fine for CRUD, but I would never use it for a greenfield project when there are so many other options.