You can find each of the datasets in the following links:

Vowel:
https://archive.ics.uci.edu/ml/datasets/Connectionist+Bench+(Vowel+Recognition+-+Deterding+Data)


Satimage:
https://archive.ics.uci.edu/ml/machine-learning-databases/statlog/satimage/


Caltech101:
https://www.umiacs.umd.edu/~zhuolin/projectlcksvd.html
Original Image:
http://www.vision.caltech.edu/Image_Datasets/Caltech101/


Letter:
https://archive.ics.uci.edu/ml/datasets/letter+recognition 


NORB:
http://www.cs.nyu.edu/~ylclab/data/norb-v1.0/


Shuttle:
https://archive.ics.uci.edu/ml/datasets/Statlog+%28Shuttle%29


MNIST:
http://yann.lecun.com/exdb/mnist/


CIFAR-10:
https://www.cs.toronto.edu/~kriz/cifar.html
