In reply to Neil:
The one that averages HVS ish on the Troll and is totally free is called the Rimmon Route. Pitches 11 - 15 have sadly been destroyed by a monster rockfall in 1998. I dont think is has been reascended since then...
Truck loads of info in the book Klatrig i Romsdal around p138, including a photo of the rockfall, awsome.
Most of the other routes require some Aiding skills, but the other free one is Trolljeringruta, but the guide says it is hard and serious for the grade, with poor pro and only 1 repeat in 20 years....
Anyway, there's shit loads of other stuff in the area, well recomend the guide - its in Norwegian and English.
Have a good one.