Ola Jeppsson has worked hard over the last few months to bring all the open source packages under Parallella together under one roof. This is a major update to the official Parallella headless SD card images. If you are looking for the latest Ubuntu, Linux, GCC, GDB, you will appreciate this new release.
Some highlights of the new release:
Ubuntu Vivid 15.04 (stock)
Linux kernel 4.4 (stock)
New and improved elink (with mailboxes, MMU, and higher write speeds)