Chrome: Kill Evil is a simple extension that disables annoying scripts all across the web, like sites that won't let you right-click, sites that won't let you copy images, or sites that paste in citation links whenever you copy their text.
Most of these annoying tweaks run on JavaScript, and while you can disable all scripts with an extension like NoScript, you risk disabling JavaScript features you actually want. Kill Evil is a happy medium between the two: It lets JavaScript run on most pages, but disables some of the more popular annoyances people can add to their sites, including:
- Sites that disable the right-click menu
- Sites that automatically bring up the print dialog when you view the printer-friendly version of an article
- Pages that prevent you from copying their text, add citation links to copied text, and more
- Sites that don't let you resize the window in a certain way
- Sites that force you to open all links in a new tab
Every once in a while, it does get something wrong though, so if you find a page isn't working correctly, you'll still want to whitelist it in Kill Evil's preferences (many of the extension's reviews mention that you should whitelist most Google services, since they run a lot of JavaScript). That said, it's a great way to quickly get rid of some big web annoyances without blocking scripts altogether.
Kill Evil is a free download, works wherever Chrome does.
Ever wish you could edit the contents of your iPhone's clipboard before you paste? ClipboardEdit makes that possible by sticking a tiny text field inside of Notification Center. From there you can edit any copied text before you paste it. 
If you want to save the contents of the Mac OS X clipboard, or just don't want to bother with it at all, you don't have to. You can just drag text (or, presumably, any other media) from one app to another using the dock or even the app switcher. 
Firefox: If you've ever had to copy and paste parts of the same page into a new document, you know it can be annoying to copy once, paste, go back, copy again, paste, and repeat the process several times when you should be able to do it all once. That's where MultiCopy, an add-on for Firefox that copies and appends text to the clipboard instead of clearing it each time, comes in. 
