JavaScriptの圧縮と整形

JavaScriptの圧縮：　JSMin、Dojo compressor、YUI Compressor

As stated at the Pack your Javascript(he also mentioned YUI: Weighing in on Pageweights)

Douglas Crockford's JSMin

Dean Edward's Packer

　　　　　　　　　　　　　
JavaScriptの整形：　Pretty Printer for PHP, Java, C++, C, Perl, JavaScript, CSS、JavaScript Code Improver


Added on 2009/04/17, this following one is a very good guy in formating Javascript source file.

Javascript beautifier