I just installed the Sublime Text under Windows Vista, and even following the advice given in this post, namely to explicitly set View > Syntax > JavaScript >
I developed a new plugin called JavaScript Enhancements, that you can find on Package Control. It uses Flow (javascript static type checker from Facebook) under the hood.
Furthermore, it offers smart javascript autocomplete (compared to my other plugin JavaScript Completions), real-time errors, code refactoring and also a lot of features about creating, developing and managing javascript projects.
See the Wiki to know all the features that it offers!
An introduction to this plugin could be found in this css-tricks.com article: Turn Sublime Text 3 into a JavaScript IDE
Just some quick screenshots: