Build your own
At ACA we have one very talented pilot who has built a beautifully simple and functional web site which links into our crew scheduling software. It started out small but has become quite powerful. It does bidding, trip trading, reserve bucket viewing, online time cards and crew messaging to payroll, scheduling and human resources. It is also evolving quickly with pilot imput. It is amazing to write a typical pilot suggestion (whiney complaint) on a message board and see an improvement to the softwre based on that complaint the next day. It can be accessed using any internet connection without cost. Pilots are generally computer savvy people and from the few guys I know at ASA you guys have more than enough talent. Don't buy or copy something that does not fit your needs. build something that fits your pilot groups needs.
(and yes flica tried to hire our pilot away but thank god he said NO.)