3rd-Party Tools
General ViewDNS.info (opens in a new tab) - A list of a whole bunch of awesome DNS tools Hurl.it (opens in a new tab) - Make HTTP Requests AutoPrefixer (opens in a new tab) - Add the desired vendor prefixes and remove unnecessary in your CSS
Chrome Extensions
Check My Links (opens in a new tab) - Scan one page for any broken links Linkclump (opens in a new tab) - Lets you open, copy or bookmark multiple links at the same time.
Accesibility AXE Chrome Extension (opens in a new tab) Chrome Accesibility Tools (opens in a new tab)
Image Compression
TinyPing (opens in a new tab) - Run PNGs through this!
Background & Texture Generators
Transparent Textures (opens in a new tab) - Lots of background textures. Just generate, download image and copy CSS Site Origin (opens in a new tab) - Another option. S’ok. BGPatterns (opens in a new tab) - More fun/colorful background patterns. Think christmas sweaters.
Favicon Generators
DynamicDrive (opens in a new tab) - Ugly but gets the job done iConvertIcons (opens in a new tab) - Just another option. http://www.google.com/s2/favicons?domain=domainname - Favicon Stealer
Color Schemes
Coolors (opens in a new tab) - Easy to use. Completely random color palettes. ColorHunt (opens in a new tab) - User created schemes
Backup
Sitesucker (opens in a new tab) - Mac