Thought this would be useful for a lot of people. Bundle Stars currently has Axis Game Factory included in it's latest bundle for £3.59. Seems like a great price for what you get in the bundle or even for Axis alone. £15 on steam usually. After checking I think this is just the standard version, not premium (£60 version).
http://www.bundlestars.com/all-bundles/adrenaline-bundle/
AGF empowers game designers and developers to rapidly create game maps, sculpt terrain and design levels quickly and easily. With over 500 assets already stocked in the warehouse, along with 28 pre-set themes and 8 sample maps, developers can begin creating levels in minutes. AGF includes all of the necessary plug-ins, scripts and shaders to allow all Unity4 users the ability to import AGF scenes into Unity4. Exporting original asset packages (AGF packages of your original assets and/or models) for use in AGF is supported only with the use of a Unity4 Pro license.
http://www.axisgamefactory.com/