Chrome: If you're in the middle of an online research session, you might want to open a bunch of links in a separate background window. Instead of dragging tabs back and forth, Open In Specific Window can do the legwork for you.
The extension does what it says on the tin. When you right click any link in Chrome, one contextual menu will let you choose from any of your open Chrome windows to open the link. It only identifies them though by their current dimensions and a seemingly random ID number, so it can be a little confusing if your windows are sized similarly to pick the right one. Once you get used to how they're identified and arranged though, this is a nice little bonus feature for your Chrome right click menu.
Open In Specific Window (Free) [Chrome Web Store]