2. PrprGitHub pull requests' reaction bot
4. Ocaml HoogleOCaml API search allows you to search many standard O'Caml libraries by either function name, or by approximate type signature. It is similar to Hoogle, which is a Haskell API search engine.
You could use this on Web browser.
5. Tiny Web Serverhttp server serve static files to public it for other machines at same network.