Chrome-only: If you often find yourself discovering images and files you want to save but don't really want to deal with them right this moment, Cloud Save attempts to solve that problem. By right-clicking on an image or download link, you can opt to send that file to one of many cloud-based services.
Cloud Save is very simple to use. Once you've got it installed, just right-click on an image or link in Chrome and you'll see an option called Cloud Save, which contains a submenu of several supported cloud services (you get more for images than you do for other files). If you select a service for the first time, Cloud Save will ask you to authorise it with your account. After that, simply selecting that service through Cloud Save's submenu will initiate the file download to your account. You can save files to Dropbox, post images to Flickr, and access a whole bunch of other services. It's pretty simple, neat and free.