MileSeat
If you book flights with airline miles, you normally have to check each airline's website date by date to find award seats. MileSeat pulls real-time award availability for 9+ airlines — British Airways, Qatar Airways, Cathay Pacific, Etihad, Air France, KLM, Virgin Atlantic, Iberia and JetBlue — into one 365-day calendar that is colour-coded by availability, so a whole year of options is visible at a glance. You can filter by cabin (Economy, Premium Economy, Business, First) and set an email alert on a route to be notified when new award seats open. Economy search is free with no signup.