A life saving utilities a web developer should know

1. Fire Bug
2. Colorzilla
3. File Zilla
4. ViewPure 
• Watch a YouTube video. Just the video and not the rest of the crap or ads or other videos around it. It's readability for YouTube.
5. StackOverflow 
• Get your questions answered here! If you haven't heard, you better ask someone.
6. Bit.ly 
• All the goodness of TinyUrl with statistics, real-time tracking, accounts and much, much more. If you get a Bit.ly url, add a + to the end of it to see lots of statistics!
7. gSkinner 
• An amazing Flash-based online RegEx tool for writing and testing RegEx.
8. JS-Fiddle
• Sometimes you just want to fiddle with JavaScript. Fire up a text editor, IDE or Firebug? Naw, man. Use JSFiddle, load your framework of choice and get to work. HTML, CSS and JavaScript plus your results. Then share with a friend!
9. Visual Studio Gallery 
• All the world's extensions to Visual Studio in one place, and ranked by the public. Easy to search and sort.
10. CodePaste.NET 
• When you write code, you need to share it.
11. LINQPad
• Interactively query your databases with LINQ with this tool from Joseph Albahari. A fantastic learning tool for those who are just getting into LINQ or for those who want a code snippet IDE to execute any C# or VB expression.
12. Join.me
• when I just want to share my screen and give a URL to a bunch of people who can view it without anything other than Flash, I use Join.me
13. DropBox
• It's on every platform I want it on. It works great with large stores (mine is over 60gigs) and also allows selective sync for small amounts of data in just certain folders. Ultimately, though, get yourself some cloud storage because when you stuff is just "there", life is better.