Synergy

Share one mouse and keyboard between multiple computers.

Synergy is free and open source (free as in free speech), meaning you are free to run it and redistribute it with or without changes.

Building on Linux

If you're running Ubuntu or Linux Mint, install the following:

sudo apt-get install cmake make g++ xorg-dev libqt4-dev \
    libcurl4-openssl-dev libavahi-compat-libdnssd-dev libssl-dev libx11-dev

Then run the following:

./hm.sh conf
./hm.sh build
# This command will build a .deb package.
./hm.sh package deb

Building on Mac OSX

1. Install Homebrew
2. Install XCode via the App Store. (Search for it)

Open a Terminal and run this to install XCode commandline tools:

xcode-select --install

Then install cmake.

brew install cmake

Install Qt4 from this guy's repo: https://github.com/cartr/homebrew-qt4

If you have installed Qt5, then you might want to remove that, it might cause issues. (It may or may not work.)

brew tap cartr/qt4
brew tap-pin cartr/qt4
brew install qt@4

Then run the following to build an application:

./hm.sh conf
./hm.sh build
./hm.sh dist mac