Eve Fitting Tool:
http://eve-files.com/media/corp/Gripen/EFT.zip

Damage types
Gurista/EoM: 0.75 kin/0.25 therm
Angel: 0.7 exp/0.2 kin/0.1 em
Sansha/Blood raider/Amarr empire: 0.5 em/0.5 therm
Serpentis/Caldari state: 0.5 kin/0.5 therm
Gallente federation: 0.5 kin/0.4 therm/0.1 em
Minmatar republic: 0.5 exp/0.2 em/0.2 kin/0.1 therm
Mercenaries: 0.5 therm/0.3 kin/0.1 exp/0.1 em
Rogue drones: 0.7 exp/0.2 kin/0.1 therm

Weaknesses
Angel Cartel - Explosive
Blood Raider - EM
Guristas - Kinetic
Sansha's Nation - EM
Serpentis/Sevens - Kinetic
Mercenaries - Thermal
Drones - EM / kinetic
Amarr Navy - EM / Thermal
Caldari Navy - Kinetic
Gallente Navy - Thermal
Minmatar Fleet - Thermal
Ammatar Mandate - Thermal
Thukker Tribe - Thermal

eve-survival.org - mission guide
eveinfo.com - detailed mission/rat stats
battleclinic.com - database of ship setups and discussions