The current version is release 7 of 27-Jun-2009. This is a stable and solid foundation for many application's JPEG support.
You can find our code and some supporting documentation in the directory files. There is a Unix format package in tar.gz archive format jpegsrc.v7.tar.gz and a Windows format package in zip archive format jpegsr7.zip.
To learn more about how to use JPEG, see the JPEG FAQ. If you'd like to learn about how JPEG works, start with the comp.compression FAQ.
The ISO JPEG standards committee has their own web site. IJG is not affiliated with the ISO committee.
IJG development continues. Advanced features are being prepared for coming releases...