# Interesting Taps & Forks

A _tap_ is homebrew-speak for a Git repository containing extra formulae.
Homebrew has the capability to add (and remove) multiple taps to your local installation with the `brew tap` and `brew untap` commands. Type `man brew` in your Terminal. The main repository [https://github.com/Homebrew/homebrew-core](https://github.com/Homebrew/homebrew-core), often called `homebrew/core`, is always built-in.

Your taps are Git repositories located at `$(brew --repository)/Library/Taps`.

## Unsupported interesting taps

*   [denji/nginx](https://github.com/denji/homebrew-nginx): A tap for NGINX modules, intended for its `nginx-full` formula which includes more module options.

*   [InstantClientTap/instantclient](https://github.com/InstantClientTap/homebrew-instantclient): A tap for Oracle Instant Client. The packages need to be downloaded manually.

*   [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).

*   [petere/postgresql](https://github.com/petere/homebrew-postgresql): Allows installing multiple PostgreSQL versions in parallel.

*   [titanous/gnuradio](https://github.com/titanous/homebrew-gnuradio):  GNU Radio and friends running on macOS.

*   [dunn/emacs](https://github.com/dunn/homebrew-emacs): A tap for Emacs packages.

*   [sidaf/pentest](https://github.com/sidaf/homebrew-pentest): Tools for penetration testing.

*   [osrf/simulation](https://github.com/osrf/homebrew-simulation): Tools for robotics simulation.

*   [brewsci/bio](https://github.com/brewsci/homebrew-bio): Bioinformatics formulae.

*   [brewsci/science](https://github.com/brewsci/homebrew-science): Software tailored to scientific endeavours.

*   [davidchall/hep](https://github.com/davidchall/homebrew-hep): High energy physics formulae.

*   [lifepillar/appleii](https://github.com/lifepillar/homebrew-appleii): Formulae for vintage Apple emulation.

## Unsupported interesting forks

*   [mistydemeo/tigerbrew](https://github.com/mistydemeo/tigerbrew): Experimental Tiger PowerPC version.

*   [Linuxbrew/brew](https://github.com/Linuxbrew/brew): Experimental Linux version.