In alphabetical order... Not all are included, because I don't care about them.

Animal Alpha (Øyafestivalen, 2005)
Asphyxsis (Checkpoint Charlie and De Røde Sjøhus, 2006)
Avenged Sevenfold (Hove, 2008)
Backyard Babies (Folken, 2009)
Band of Horses (Folken, 2008)
Bare Eagles Band (Folken, 2008)
Bare Egil Band (Folken, 2008)
BIG BOMBASTIC COLLECTIVE (Cementen, 2007)
Black Lips (Hove, 2008)
Black Sabbath (Oslo Stadion, 2005)
Built to Spill (Folken, 2008))
Cat Power (Roskilde, 2008)
Cavalera Conspiracy (Hove, 2008)
Chrome Hoof (Hove, 2008)
DDR (Folken 2008 & 2009)
deLillos (Bjergstedsparken, 2007)
Dengue Fever (Roskilde, 2008)
The Dillinger Escape Plan (Roskilde, 2008)
Duffy (Hove, 2008)
the dø (Roskilde, 2008)
eriK Salvesen (Folken, 2008)
Fitts for fight (Tou Scene, twice)
Fjorden Baby! (By:Larm & Hovefestivalen, 2009)
Franz Ferdinand (Øyafestivalen 2005 & Hovefestivalen 2009)
Freestyle Picnic (twice, 2008))
Gatas Parlament (Metropolis, 2008)
Grinderman (Roskilde, 2008)
Hayseed Dixie (Folken, 2008)
Hellacopters (Pulpit og Hovefestivalen)
HOH (Nordic Music Week, 2008)
Howlin Rain (Folken, 2008)
Håkan Helström (Folken, 2009)
Ikke Bare Bare Egil Band Band (Folken, 2008)
In Flames (Hove, 2008)
Influence of the Dead Marsipan (many times...)
Ingrid Olava (Nordic Music Week, 2008)
Iron Maiden (Oslo Stadion, 2005)
Jackman (Pulpit, 2005)
Jóse Gonzáles (Roskilde, 2008)
Job for a Cowboy (Hove, 2008)
Johnny Hancocks (everywhere)
Juan Formell y los Van Van (Roskilde, 2008)
Judas Priest (Roskilde, 2008)
Kaada (Nordic Music Week, 2008)
Kaizers Orchestra (many times)
Katzenjammer (Folken, 2008, twice)
Killswitch Engage (Hove, 2008)
The Lovestreets (Checkpoint Charlie, 2008)
Lukestar (Hove, 2008)
Lupe Fiasco (Hove, 2008)
Madrugada (Pulpit, 2005 and twice at Folken, 2008)
Mannepenis (around....)
Mogwai (Roskilde, 2008)
Motorpsycho (Folken and Roskilde, 2008)
Marit Larsen (Folken, 2008)
Mugison (Roskilde, 2008)
The National Bank (Folken, 2008)
Neil Young (Roskilde, 2008)
The New Wine (By:Larm, 2009)
Noxagt (Nordic Music Week, 2008)
Plumbo (Checkpoint Charlie, 2008)
The Raconteurs (Hove, 2008)
Radiohead (Roskilde, 2008)
Roger Waters (Stavanger Stadion, 2006)
Rosa Parks (Grottene, 2008)
Rumble in Rhodos (Roskilde, 2008)
Satyricon (Pulpit, Folken 2008)
Sebastian Waldejer (Tou Scene, 2007, Folken and Nordic Music Week 2008)
The September When (Folken, 2009)
Shining (Nordic Music Week, 2008)
The Shock! (Nordic Music Week, 2008)
Skambankt (Folken, 2009)
Susanna (Nordic Music Week, 2008)
Teitur (Roskilde, 2008)
That Special Monkey Hug (Justisen, 2006?)
Thom Hell (Folken, 2008)
Thomas Dybdahl (Pulpit and Stavanger Sentrum, 2006)
Timbuktu (Pulpit, 2007 and Folken, 2008)
Turbonegro (Pulpit, 2005)
Ungdomskulen (Folken and Hove, 2008)
Under Byen (Nordic Music Week, 2008)
Valentourettes (Folken, 2008)
The Violent Pineapple Syndrome (Metropolis, 2008)
VETO (Nordic Music Week, 2008)
White Lies (Hovefestivalen 2009)
Volbeat (Folken, 2008)
Yessayer (Hove, 2008)

...more to come...