Any app that allows you to import a sequence of images and export as video file will work. I usually use adobe premiere. Since Maya outputs it's images with sequence numbers, all you have to do is start a project in premiere and import the first image. It will ask if you want to import the entire sequence....say yes and there ya go. Now just make sure your project settings (duration) for still images are set to 1 (which isn't the default). Select all the images and drag them to the timeline. Then just export your animation in your file format of choice. I've done this in Flash as well (the final output being flash file of course).

--Pete

P.S. After Effects is Adobe's video compositing application