Downloading Marlin for general use? Please select the releases tab or go directly to https://github.com/ErikZalm/Marlin/releases and download the latest.
Interested in the latest bleeding edge features and bugs? https://github.com/ErikZalm/Marlin/tree/Development. Click on the "download Zip" in the lower right corner or direct link: https://github.com/ErikZalm/Marlin/archive/Development.zip
Interested in developing for Marlin? Fork https://github.com/ErikZalm/Marlin/tree/Development, and submit pull requests against the Development Branch.