Airline Quality – Skytrax reviews airline seat pitch and seat size information for world airlines in first, business and economy class.
Flat Seats – Another Skytrax review site, this one is for airline flat-bed seats for first and business class. Features passenger seat reviews, airline cabin seat maps, comfort ratings, and tried & tested seat reviews.
SeatExpert – Detailed airplane seat maps and seating advice.
SeatGuru (by Tripadvisor) – Airplane seat information hub. Includes seat information such the best seats by aircraft type, legroom, and recline information. Seat advice, user comments, and photos.
SeatMaestro – Information on airplane seats featuring airline seat maps, detailed descriptions of seats, and choosing the best seat.
SeatPlans.com – Information for economy, premium economy, business or first, with accurate seat plans sourced directly from the major airlines. Includes advice, reader reviews and independent news.