mathURL

This is the greatest tool for a long time. Writing complicated equations in LaTeX can be syntactically tricky. Reinforcements have arrived. MathURL auto-compiles the equations while you write them and shows the result on top of the source code.

Additionally, you are permitted to embed LaTeX equations in your web page. You are provided with a URI to the image. For example, <img src="http://mathurl.com/?img=5euwuy" alt="" /> will emerge as