As a user of and contributor to Caffe [1], I have to take the opportunity to plug it here. Like the CCV classifier linked, Caffe is fully open-source [2], has a downloadable state-of-the-art model pre-trained on ImageNet [3], and scripts/documentation that make it very easy to compute features using our pre-trained model or other models [4].
Unlike the linked CCV release (unless I'm misinformed -- haven't actually tried it, please correct me if I say anything inaccurate), Caffe supports completely customizable architectures via a configuration language, fully supports training [5], finetuning [6], and inference (feature extraction/classification) in these customizable architectures, and seamlessly runs on both CPU and GPU.
Caffe is also very fast; twice as fast at CPU feature computation as its predecessor DeCAF, and faster than cuda-convnet at training/testing ImageNet architectures on a Titan/K40 GPU.
The linked CCV release does mention Caffe, but quickly dismisses it due to the license. It's true that our pre-trained model [3] is licensed only for non-commercial use, but ALL of the Caffe code is BSD-licensed, including the exact script we used to train said model. So if you're a commercial entity, using Caffe for feature extraction/classification from a state-of-the-art network is a matter of purchasing a $1000 GPU (NVIDIA Titan -- I'm assuming you own a computer), downloading the ImageNet dataset, and waiting about a week for training to converge. This will buy you the ability to adapt the classifier to YOUR visual classification problem by finetuning [6], rather than being stuck with the particular 1000 categories the pre-trained model knows about.
[1] http://caffe.berkeleyvision.org/
[2] https://github.com/BVLC/caffe
[3] http://caffe.berkeleyvision.org/getting_pretrained_models.ht...
[4] http://nbviewer.ipython.org/github/BVLC/caffe/blob/master/ex...
[5] http://caffe.berkeleyvision.org/imagenet_training.html
[6] http://caffe.berkeleyvision.org/caffe-presentation.pdf (see page 14)