Elive, uma distro com bibliotecas próprias, nada dos pesos-pesados KDE e Gnome.

Minimum Requeriments: The minimum hardware for running Elive is a 100 Mhz CPU and 64 MB of RAM, but the minimum recommended hardware is 300 Mhz and 128 Mb of RAM. You don't need any special graphic card or 3D acceleration to run Elive.

Dá pra metaReciclar máquinas supostamente legadas e dar um excelente visual ;)

Via guia do hardware.