WattOS is a lightweight Linux distribution based on Ubuntu and an ideal operating system for outdated computers.

WattOS R7, based on Ubuntu 13.04 Raring Ringtail has been released a few days ago, running with LXDE. The new wattOS has multi-monitor support, improved printing management and a decreased resource consumption on laptops.
WattOS works on Intel Pentium 3 (and higher) computers, needing only 192-156 MG of RAM.
WattOS has installed, by default, the following applications:
- Chromium 25.0.1364.160 with flash player already installed
- PCManFM 1.1.0
- Filezilla 3.6.0.2
- Transmission 2.77
- Abiword 2.9.2, gnumeric 1.12.1
- ePDFViewer 0.1.8
- Audacious 3.3.4
- Cheese 3.6.2
- VideoLAN VLC 2.0.6
- Xfburn 0.4.3
If I have convinced you to try WattOS R7, download WattOS from the official site.