Set Holo theme in older Android versions?

Question

I have used several applications which appear to use Android 4.0's 'Holo' theme, whilst still running on an older version of Android (2.3). Is there a supported way to do this or have these developers designed their own custom themes?

Thanks.

Answer 1

I am working on this:

https://github.com/ChristopheVersieux/HoloEverywhere

EDIT: Moved to: https://github.com/Prototik/HoloEverywhere

Might be really fit your needs.