Coda is a plugin that guesses sequences for free.
Not only is it a useful tool for coding efficiency, but Extender is also well-behaved. However, it's worth noting that it might throw a bit of a hissy fit if you try to extend something crazy. But don't let that discourage you from using it. Overall, Extender is a reliable plugin that can save you a significant amount of time and energy in your coding endeavors.
Version 1.0 FC2: N/A