Nirvana is my favorite band and possibly the best of the 90's for me. In Utero is an excellent album that I feel is their masterpiece.

You Know You're Right
Dumb
Heart Shaped Box
Lithium
Sappy (No Alternative)
Rape Me
Pennyroyal Tea
Something in the Way
All Apologies
Radio Friendly Unit Shifter
Drain You
Oh Me (unplugged cover)
Frances Farmer Will Have Her Revenge on Seattle
Polly
Paper Cuts
Come As You Are
Lake of Fire (unplugged cover)
Plateau (unplugged cover)
Do Re Mi (With the Lights Out)
The Man Who Sold the World (unplugged cover)
The Man Who Sold the World (Outcestide II - The Needle And The Damage Done, cover)
Serve the Servants
Downer
Big Cheese
Milk It
Very Ape
You Know You're Right (With the Lights Out)
Sifting
Scoff
If You Must (Outcesticide: In Memory of Kurt Cobain)
You Got No Right "Autopilot" (Outcesticide V: Disintegration)

The above are only my favorites. :p