This is the list of flex frame works Which I came Across, Let me know if i miss any

1. Cairngorm (Adobe Open Source)

2. PureMVC (Open Source)

3. Mate (Open Source)

4. Swiz (Open Source)

5. Spring ActionScript (Open Source)

6. Parsley (Open Source)

7. Robotlegs

8. HydraMVC

9. dpHibernate

10. Fight Framework

11. Lowra Framework