Node.js
Using modern Javascript for quick utility scripts - bulk search and replace
With as much Javascript work as we're doing these days, I'm starting to do more and more quick one-off utilities in Javascript. Yesterday I had such a task: update over a hundred different ad slot codes that appeared multiple times in a text file.
Dojo/Javascript Development
We're big fans of the Dojo Toolkit, a Javascript framework that allows you to build rich Internet applications right in the browser. We're impressed with the power and flexibility, and have built several big applications on it in addition to solving lots of small tasks.
We've also used other Javascript libraries, including JQuery, Prototype, Scriptaculous, and several others.