Linux Mint Helena LXDE is a distro based on Linux Mint 8 Main Edition, Linux 2.6.31, Openbox 184.108.40.206, PCManFM 0.5.2, and Xorg 7.4. It features a complete and familiar desktop experience while being low on resource usage and is suitable for a good variety of older hardware. The benchmarks are remarkable. Boot time from Grub to the login manager is about 26 seconds, the same benchmark as XFCE and less than Fluxbox. RAM usage at idle is only at 141 MB. If you have an old and aging hardware, Linux Mint Helena LXDE may be the path to go. It’s fast with a very small footprint. Learn more.
With Linux, you can run multiple desktop environments such as Gnome, KDE, Openbox, XFce and a several others in a single of install of Linux. This short video demonstrates how easy it is to switch from one desktop environment to the other using Ubuntu.