WILD:Weather and Illumunation Database:
http://www1.cs.columbia.edu/CAVE/software/wild/

PLACES Database: Scene Database: 
http://places.csail.mit.edu/

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

USPS :digital Database
http://www-i6.informatik.rwth-aachen.de/~keysers/usps.html

SVHN:digital Database
http://ufldl.stanford.edu/housenumbers/

amazon,webcam,dslr dataset for transfer learning:objects
http://www-scf.usc.edu/~boqinggo/domainadaptation.html#pub

calthch 256:objects
http://authors.library.caltech.edu/7694/

voc2007
http://host.robots.ox.ac.uk/pascal/VOC/voc2007/

mrsc:
https://download.microsoft.com/download/5/6/A/56A19DD6-35FB-47A2-A9B2-74E66D269345/msrcorid.tar.gz

COIL-20:
http://www.cs.columbia.edu/CAVE/software/softlib/coil-20.php

RGB-NIR Scene Dataset 
http://ivrl.epfl.ch/supplementary_material/cvpr11/index.html