This is the main FEniCS download, suitable for most users. It includes everything needed to get you started with FEniCS.
For information on user contributed binary packages, see Contributed packages.
If the binaries do not apply to you, or you want to install directly from source, try one of the two other possibilities:
Every night, FEniCS snapshot releases are automatically generated for Ubuntu and Mac OS X. They are made available at our snapshots page.
For information on accessing the development repositories, see Contributing.