Omnipay created by Adrian Macneil. The lib provides unified api for 25+ gateway gateways. Plus, it simple, has unified, consistent API and fully covered with tests. This bridge allows you to use omnipay gateways but in payum like way.
OmnipayBridge is an open source, community-driven project. Pull requests are very welcome.
Star payum on github or packagist.
OmnipayBridge is released under the MIT License.