Most camera rigs involve some level or rod mounts to support everything.  However, for small, run and gun shooting this may be too bulky.  Cinevate has designed a very sleek new rig which eliminates rails but still allows for handle and brace supports.

Find out more about the Simplis rigs here.

[UPDATE] Here is an interview of planetMitch with Dennis Wood from Cinevate about their new rigs.

Via planet5D.