Goldenware Travel Technologies used to make PC-based timetable software for a lot of airlines and alliances. They even made a general timetable software which essentially combined all of the airlines and/or alliances into one package. I'm guessing they are now out of business.

This is the only link I have found for the company, but it goes nowhere... http://www.skyguidetimetable.com/iphone/

I used to do data mining for a game that required airline schedules, and I paid for a KVS Tool subscription because it was the easiest thing to do.