Need to download all images in an online album and don't want to click each image to save it to your computer? Try RipMe, a Java tool with both graphical and command line interfaces, to mass download images from various sources.
RipMe runs on macOS, Linux and Windows, and it can download all images in an album by just entering the album link. It supports popular websites like Imgur, Instagram, Reddit (you can download all the images of a subreddit or all the images submitted by an user), Flickr, Twitter, Tumblr, DeviantArt, and more.