SDF is released under the BSD open-source license.

The latest source release of SDF is: * SDF 2.6.3 source bundle

A binary distribution for Linux/x86 is also available: * SDF 2.6.3 linux binary distribution

The SDF bundle contains: * the SGLR parser * the SDF2 parser generator * the Pandora formatting tool, based on Box. * the ATerm library (C library)

There are continuous updates here: * Continous Source Distribution * Continuous Binary Distribution for linux/x86

Older releases can be found here.