1. Sandman is an Israeli psytrance producer since 1996, also known by the aliases of 12 Tribes, Green House Effect, Izik Levy, Resistance Activity. 2. Sandman is a dance act from Switzerland, produced by Mark Wyss and Andreas Nager. Sandman released the album "Colours". 3. Sandman is a Philadelphia rapper and a member of the Re-Up Gang. 4. Sandman is a country/folk artist, connected to the CrimethInc. Ex-Workers Collective