Lubuntu is a fast, lightweight and energy-saving variant of Ubuntu using the LXDE (Lightweight X11 Desktop Environment) desktop. It is intended to have low-resource system requirements and is designed primarily for netbooks, mobile devices and older PCs.
The second alpha of the Yakkety Yak (to become 16.10) has now been released! This milestone features images for Lubuntu, Ubuntu MATE and Ubuntu Kylin. Pre-releases of the Yakkety Yak are *not* encouraged for anyone needing a stable system or anyone who is not comfortable running into occasional, even frequent breakage. They are, however, recommended for Ubuntu flavor developers and those who want to help in testing, reporting and fixing bugs as we work towards getting this release ready. Alpha 2 includes a number of software updates that are ready for wider testing. This is still an early set of images, so you should expect some bugs. While these Alpha 2 images have been tested and work, except as noted in the release notes, Ubuntu developers are continuing to improve the Yakkety Yak. In particular, once newer daily images are available, system installation bugs identified in the Alpha 2 installer should be verified against the current daily image before being reported in Launchpad. Using an obsolete image to re-report bugs that have already been fixed wastes your time and the time of developers who are busy trying to make 16.10 the best Ubuntu release yet. Always ensure your system is up to date before reporting bugs.