For those, like me, who don't know what Functional Exercise, GoAnimal defines it like this:
Technically speaking, a functional exercise is multi-joint and multi-plane; this is the definition favored by physical therapists. More broadly, a functional exercise is one that is relevant to real-world challenges. An exercise is considered functional when it prepares us for some movement challenge that we are actually likely to encounter.Thanks for asking....
Speaking of GoAnimal, it has a nice list of exercises.....see them here. You'll find hover steps, skating steps, touch low/reach high, partner-resist core squats and more.
About.com again does a great job. See Best Ab Exercises and Core Exercises
Physical Therapy Connections has a nice list of exercises to try with very clear directions.
Getfitsource. Sure, they sell products. But they have some great videos and workouts here for download - fa-ree!
I'm tired just thinking about it all.
Good luck :)