Voice Cast-
Billy West as-
Fry
Professor Farnsworth
Dr Zoidberg
Zapp Brannigan
Smitty the Police officer
Leo Wong
Most of the rebelling robots (Coffee Machine, Garbage Disposal, Fan, Lamp).
other various characters
John Dimaggio as-
Bender
Elzar
Ignar
Randy
Joey Mouse Pad
URL
Other Various characters
Katey Segal as
Leela
Tress MacNeille as-
Hattie
Mom
Linda
Monique
Nibblonian Female
Turranga Munda
Other Various Characters
Lauren Tom as-
Amy
Inez Wong
Other Various Characters
Maurice La' Marche as
Kif
Morbo
Calculon
Nibblonian Leader
The Donn Bot
Walt
Horrible Gelatinous Blob
Other Various Characters
Phil La'Mar as
Hermes
Dave Herman as
Larry
Slurm-machine Robot
Mayor Poopenmyer
"Thunder Cougar Falcon Bird" guy
Other Various Characters
Frank Welker
Nibbler
Nibbler Speaking
Every other animal noise (El Chupanebre, geese, anteaters etc)
Kathie Soucie as-
Michelle
Cubert
Thats all I know for now... I sure someone else can fill in the gaps.
EDIT: Filled in some gaps