FMRIB Software Library

The FMRIB Software Library, abbreviated FSL, is a software library containing image analysis and statistical tools for functional, structural and diffusion MRI brain imaging data.
FSL is available as both precompiled binaries and source code for Apple and PC (Linux) computers. It is freely available for non-commercial use.
History and Development.
FSL is written mainly by members of the FMRIB (Functional Magnetic Resonance Imaging of the Brain) Analysis Group, Oxford
University, UK. The first release of FSL was in 2000; there has been
approximately one major new release each year to date. The FMRIB
Analysis Group is primarily funded by the Wellcome Trust and the UK EPSRC and
MRC Research Councils.