Raumrot.com
Raumrot.com presents “free, handpicked stockphotos” for commercial and personal uses. As of July 2015, there are 681 of such images. Users can browse by categories or by special image sets.
Mauritshuis Collection
The Mauritshuis is home to the Royal Cabinet of Paintings, which consists some of the world’s famous paintings by the Dutch and Flemish masters from the Golden Age. Popular examples include Vermeer’s Girl with a Pearl Earring and The Goldfinch by Fabritius. Most of their works of art can be discovered online with close to 900 images in their online collection. Users can search or filter by artist, date, object type, material and inventory number.
NASA’s Earth Observatory Images
As part of the EOS Project Science Office located at NASA Goddard Space Flight Center, the mission of the Earth Observatory is “to share with the public the images, stories, and discoveries about the environment, Earth systems, and climate that emerge from NASA research, including its satellite missions, in-the-field research, and models”. Users can do a keyword search or browse images by different categories. Users can also generate images of global maps to explore key parts of the Earth’s climate system. The images are based on data provided by the NASA satellites.
Lock & Stock Photos
Lock & Stock Photos provides photographs taken by social media marketeer, AJ Montpetit.
MNML Wallpapers
MNML provides minimalistic wallpapers designed by social media marketeer, AJ Montpetit.
Split Shire
Developed by Italian photographer and graphic designer, Daniel Nanescu, Split Shire provides copyright-free photographs for designers, bloggers, social marketeers and commercial companies. Users can search or browse images by categories.
Free Nature Stock
Built by web designer and developer, Adrian Pelletier, Free Nature Stock provides free public domain images that focus on nature. The site is updated with a new photo daily. Users can search or browse the images through the Archive.
PLiXS Image Database
Founded by a startup based in Switzerland, PLiXS is a database of free high resolution images. As of August 2015, there are close to 3,400 images, contributed by photographers around the world. Users can search or filter their search by photo filters and categories.
Skitterphoto
Skitterphoto provides photographs that are taken by three photographers based in Groningen, The Netherlands. Since the platform launched in 2014, a photo is uploaded every single day. Users can search or browse by categories.
British Library Flickr Commons
Since 2013, British Library released more than 1 million images to Flickr Commons. The images were obtained from the Library’s digitised collection of 65,000 books of the 17th, 18th and 19th century. The release of these images indicates the Library’s desire “to improve knowledge of and about them, to enable novel and unexpected ways of using them, and to begin working with researchers to explore and interpret large scale digital collections”. The images are arranged by different themes, such as book covers, illustrated letters, maps, flora and children book illustrations.
Vintage Printable
Vintage Printable provides images that are believed to be on public domain or out of copyright. Most of the images are focused on vintage naturalist or scientific illustrations. Users can search or browse by different categories.
Travel Coffee Book
Travel Coffee Book is a photo blog that provides photographs captured by photographers around the world. They are mainly travel photographs. 10 new photos will be added every 10 days.
ISO Republic
ISO Republic provides exclusive stock images for creatives. It is founded in 2014 by English photographer and designer, Tom Eversley. The mission is to “provide high-quality images to be used by designers, developers, bloggers, marketers and social media teams”.
Epicantus Photo Archive
Epicantus provides images that are captured by visual and UX designer, Daria Nepriakhina and other photographers.
Jay Mantri Photo Archive
Inspired by Unsplash, designer Jay Mantri provides photographs for others to “make magic”. According to the blog, seven photos will be added every Thursday.
Pexels
Developed by German web developers, Pexels provided handpicked stock photos from free image sources, such as Unsplash and Gratisography. To date, there are over 3,000 images that are on Creative Commons zero (CC0) license. Users can search or browse the images.
Walters Art Museum Online Collection
The collection of Walters Art Museum contains thousands of art works from the third millennium B.C to the 20th century, ranging from mummies to arms and armor, from old master paintings to Art Nouveau jewelry around the globe and across ages. Through their online collections, users can search or browse images in several ways, which include category, date, creator, medium and tags. Users can also login using their Facebook account to create their own online collections.
Superfamous Images
The images on this site are contributed by Superfamous Studio, a design agency led by Dutch designer Folkert Gorter.
StockSnap.io
StockSnap contains curated images by Marc Chouinard and Christopher Gimmer. The images are from around the web and photographers from their network. Users can search or browse by date, trending, number of views, number of downloads and number of favourites.
Public Domain Review Collections
Developed by The Open Knowledge Foundation, The Public Domain Review is “an online journal and not-for-profit project dedicated to promoting and celebrating the public domain in all its richness and variety”, as according to the website. Images in their collections are derived from a wide range of online archives, that are on public domain. The images are arranged by topics, where users can search or browse by time, style, genre, type, content and rights.