Ways to increase Caster Level

[Mauril Everleaf]

I'm looking for them. Aside from the Orange Ioun Stone, what are other ways to increase CL universally and not just for specific spell types?

[Karsh]

Ring of Arcane Might on page 121 of the Magic Item Compendium. It only works for Arcane casters, but there you go.

[Flickerdart]

UMDing some Beads of Karma is +4 for 10 minutes, perfect for the early morning buff routine.

[RagnaroksChosen]

Technicaly Master spell theif combined with ultimate magnus can shoot caster level through the roof.

[Starbuck_II]

I'm looking for them. Aside from the Orange Ioun Stone, what are other ways to increase CL universally and not just for specific spell types?

Adept Spirit spell?

[ex cathedra]

It'd be cool if people would compile lists of these things (http://community.wizards.com/go/thread/view/75882/19872350/Raising_Caster_Level), wouldn't it?