How to: Images / Wallpapers
* [NASA](https://apod.nasa.gov/apod/archivepix.html) - Astronomy Picture of the Day Archive
* [InterfaceLIFT](https://interfacelift.com/wallpaper/downloads/date/any/) - High resolution photography wallpapers for every screen size
* [Jeffrey Friedl](http://exif.regex.info/exif.cgi) - Jeffrey's Image Metadata Viewer (Exif viewer)
* [Exif Viewer](http://exif-viewer.com/) - Another image metadata viewer
* [François Dourlen](https://www.francoisdourlen.com/photos) - 'feel good' mash-up pictures, combining pop-culture characters and actual locations
* [WLPPR](http://wlppr.co/) - vibrant wallpapers from places of our planet
* [Psiu Puxa](http://psiupuxa.com/) - wallpapers from all over the universe
* [Free Online Picture Resizer](http://www.picresize.com/batch.php) - Easily crop, resize and edit your images online for free
* [Dale Myers](https://myers.io/2014/07/30/everything-you-ever-wanted-to-know-about-png/) - (2014) Everything You Ever Wanted to Know About PNGs
* [Moviemania](https://www.moviemania.io/desktop) - super big textless high-resolution movie wallpapers database
* [SpaceX](https://www.flickr.com/photos/spacex) - Official SpaceX Photos on Flickr
* [Will Gallego](https://codeascraft.com/2017/05/30/reducing-image-file-size-at-etsy/) - (2017) Reducing Image File Size at Etsy
* [DeepAI](https://deepai.org/machine-learning-model/colorizer) - Image Colorization API