FareBrowser is a powerful tool for "mileage runners" and frugal fliers. It provides user-friendly access to a normally unwieldy list of 500,000+ published airline fares. It provides ultimate flexibility by allowing the user to choose or even more powerfully not choose origins, destinations, dates, etc. It also takes restrictions such as advance purchases and minimum stays into account. Much of the gibberish contained in the lengthy plain text fare rules is also converted into fields that can be searched. Sample dilemmas it aims to solve include:
;)
Hopefully I didn't get your hopes up too high though, as FareBrowser is sadly no longer available. Maintaining an up-to-date database involved far too much tedious grunt work and there were also potential legal issues as the data was being mined (discretely) from sources that probably would not have tolerated it had they been aware of it. Here are alternatives that provide some overlap with FareBrowser's functionality:
AwardSeeker is to award travel as SideStep, Qixo, FareChase, and TravelJungle are to traditional travel.
Status: A lot of the framework has been developed, but Continental is the only provider to have been plugged in so far.
LoyaltyShifter is a tool to aid in making unwanted and orphaned miles more valuable.
Status: Most of the necessary data has been collected and logic has been coded, but I need to make it accessible on the web or re-architect it so that it can run as a desktop application without a bunch of dependencies such as a database engine.
AutoScripter is a utility that will allow typical end users to build generic web navigation scripts similar to the "Auto Navigation" functionality in MileTracker. Imagine Gator or RoboForm on steroids.
Status: It's mostly in my head, but there's a lot of code in MileTracker that could be reused.