This page outlines the process for obtaining the Sequel Pro source code.
If you are interested in building a copy of Sequel Pro yourself, you can checkout a read-only copy of the project using git.
Getting the Source Code
Using Mac OS X Terminal:
In Terminal.app enter the following commands to checkout a copy of the Sequel Pro source code on your desktop.
cd ~/Desktop git clone https://github.com/sequelpro/sequelpro.git sequel-pro.git
Using a Mac Application:
There are a number of Mac applications available to help you with using git on Mac OS X. In particiular we can recommend:
In Tower, use the View menu and select Show Repositories. Then click on the + in the lower left corner and select Clone Remote Repository… from the menu. Enter https://github.com/sequelpro/sequelpro.git as the Repository URL and select a destination directory on your Mac. Click on Clone to begin the process.