Which Budget Airline?
I was recently doing some research on the best budget airlines in Europe, and I ran across a neat site on google. It is Whichbudget.com. The site allows you to view the airline routes of all the budget a airlines around the world. This is especially helpful for those planning to travel through Europe, and want to know if Ryanair or EasyJet fly to their destination.

easyJet’s flight routes. WhichBudget allows travellers to surf through budget European flight routes a lot easier than the airlines’ websites.
So for example, if you go to the link to “fly out of” Maastricht, Netherlands, the site takes you to a page showing where all the cheap flights fly to from Maastricht.
The site also covers all of the other international airlines. So if you want to fly out of Chiang Mai, Thailand, you can find that Tiger Airways services them to Singapore.
Having a simple list of what flights are available gives any travel planner a starting point for searching for the best deals. It can especially be helpful when planning to fly out of more remote airports with fewer flights.
[...] The Low Cost Airline Guide is a simple, yet valuable site that allows its users to view where travelers can fly from a specific departure city. The site operates the same way Which budget does, but I think the low cost airline guide is much easier to use. [...]