Amenities

[ChattyPlanner]

My city/county is experiencing rapid growth of residential and commercial developments (like many places in the country). These developments can range from 1 acre to 200 acres of residential, commercial, or mixed-use development. These developments are allowed to build without providing much for amenities.

Which cities out there are good examples for requiring amenities with residential, commercial, or mixed-use developments? I'm looking for both carrot and stick methods: examples of cities that use requirements for providing amenities and others that use incentives to try to goad developers to provide amenities.

Amenities: Open-space, energy-conservation measures, picnic areas, recreational facilities (ball courts/fields, pools), bicycle/walking paths, etc.