Emacs plus a few org-mode files (personal, work, ledger) that work as my agenda, and extensive journal files that I update constantly throughout the day to prov

Emacs plus a few org-mode files (personal, work, ledger) that work as my agenda, and extensive journal files that I update constantly throughout the day to provide context. What I like the most about them is the fact that I can actually change them to suit my needs: I can poke around the source code, extend or overwrite its functions, add my own export backends and just make it do anything I can put into code.