I'd like to add this IS newer. That being said, I am going to be focusing on ease of use here.
Currently a lot of the deep learning frameworks out there aren't focused on a lot of practicality.
I am also hoping to add sdks for different languages trying to make this a fast general purposed deep learning core that allows for people to do neural nets in different languages while also benefiting from a fast runtime.
I'm going to be opening up a good contribution pipeline here soon and would love to answer questions where possible.
I'm looking for help on everything from documentation to feature requests.
http://torch.ch/ (used widely at large companies) http://deeplearning4j.org/ (newer)
I have no idea if they are quality or open source, just posting the information.