The JavaScript Source
One of the best resources on the Web for JavaScript. free cut & paste JavaScripts for your Web pages. Calculators, calendars, clocks, cookies, forms, navigational scripts, password protection, scrolls, user details and much more.

Website Abstraction
Good resource for JavaScript. Over 300 free scripts, as well as Web-page building tutorials.

Do it for Yourself Trends.com
This mega site has free applets, tutorials, free zines, forums and JavaScript resources. Applets, counters, clocks, search engines, menu & navigational applets and too much to list. Plus more, 69.00