Excellent websites from aboard for downloading HD pictures for free

Pixabay
https://pixabay.com/
There are about 600,000 free pictures, vector documents and art illustrations.

Gratisography
http://www.gratisography.com/
The pictures are updated weekly. It includes many pictures of fashion, which are suitable for design projects.

Life Of Pix

http://www.lifeofpix.com/
http://www.leeroy.ca/en/
Provide free HD pictures, with no copyright restrictions; most of them are pictures of European landscape.

Free Images
http://www.freeimages.com/
Many of the images are suitable for graphic designers and web designers. While all images can be downloaded for free, registration for membership is required for downloading.

Death To Stock Photos
http://deathtothestockphoto.com/
Users need to subscribe by email in order to download pictures from the website. After subscription, the website will send you free pictures every month.

Publicdomainarchive
http://publicdomainarchive.com/
It provides over 50,000 HD images for free download.

FREE REFE MOBILE PHOTOS
http://getrefe.tumblr.com/
It provides pictures mainly for mobile phone; the pictures can be downloaded for free for personal or commercial projects.

Photo Pin
http://photopin.com/
A photo search engine whose resources are from Flickr. You may choose English or Chinese to search, but the results will be different. Therefore, you can get the most suitable photos by choosing a different language.

Little Visuals
http://littlevisuals.co/
Users can pack and download photos it shares every week.

Unsplash
https://unsplash.com/
Unsplash offers free HD photos.