Here is a list of tools and resources that we have found very useful for jQuery and web developers. Definitely worth a look!

Useful Online JavaScript Tools

• jsmini.com – Online JS Minifier
• jsobfuscate.com – Online JS Obfuscator
• jspretty.com – Online JS Code Tidier
• jsfiddle.net – Online JS Snippet Saver
• jshint.com – Online JS Error Detector
• jsperf.com – Online JS Test Cases

Useful Online CSS Tools

• Image Sprite Tool: HTML5 Sprite Maker
• CSS Minifier (with CURL access)

Useful Online HTML Tools

• Quick HTML form creator: Accessify Form Wizard

Useful Online Webmaster Tools

• DNS Tool: intodns.com/jquery4u.com
• DNS Tool: i.intogeek.com/dig/?url=jquery4u.com
• Speed Check Tool: gtmetrix.com/reports/www.jquery4u.com/kzGCMP5C
• Speed Check Tool: https://developers.google.com/speed/pagespeed/insights#url=jquery4u.com

Online Project Tools

• Gliffy – The best online diagram tool

Good Image Resources

• Free PSDs – Dribble

Other Useful Tools

• http://www.sqldumpsplitter.com/ – Free SQL file dump splitter
• Closure Compiler
• Background patterns

 
More tools: http://www.jquery4u.com/tools/