*[homebrew/apache](https://github.com/Homebrew/homebrew-apache): A tap for Apache modules, extending OS X's built-in Apache. These brews may require unconventional additional setup, as explained in the caveats.
- A Bundler-equivalent for installing project dependencies from Homebrew.
*[homebrew/versions](https://github.com/Homebrew/homebrew-versions): Need e.g. older or newer versions of Postgresql? Older versions of GCC?
*[homebrew/x11](https://github.com/Homebrew/homebrew-x11): Formulae with hard X11 dependencies.
`brew search` looks in these main taps and as well in [Homebrew/homebrew](https://github.com/Homebrew/homebrew). So don't worry about missing stuff. We will add other taps to the search as they become well maintained and popular.
You can be added as a maintainer for one of the Homebrew organization taps and aid the project! If you are interested write to our list: homebrew@librelist.com. We want your help!
- GNU AVR toolchain (Libc, compilers and other tools for Atmel MCUs, useful for Arduino hackers and AVR programmers).
*[InstantClientTap/instantclient](https://github.com/InstantClientTap/homebrew-instantclient): A tap for Oracle Instant Client. The packages need to be downloaded manually.
*[besport/ocaml](https://github.com/besport/homebrew-ocaml): A tap for Ocaml libraries, though with caveats, it requires you install its customized ocaml formula. Perhaps a template for more work.
- A tap for Ocaml libraries, though with caveats, it requires you install its customized ocaml formula. Perhaps a template for more work.
*[osx-cross/avr](https://github.com/osx-cross/homebrew-avr): GNU AVR toolchain (Libc, compilers and other tools for Atmel MCUs, useful for Arduino hackers and AVR programmers).
- An experimental port of Homebrew for Windows (with an MSYS/MinGW environment).
*[wilmoore/homebrew-home](https://github.com/wilmoore/homebrew-home): Homebrew install for those that like to Homebrew @ $HOME (i.e. ~/.homebrew).
*[nddrylliog/homebrew-mingw](https://github.com/nddrylliog/homebrew-mingw): An experimental port of Homebrew for Windows (with an MSYS/MinGW environment).