Webtools

Every Developer needs tools for making the developing easier and faster.
This list is a summary of the lists I have found on the Internet .

StackOverflow

StackOverflow is in fact not one Website, but has many brothers and sisters . They say about themself:

Founded in 2008, Stack Overflow is the largest, most trusted online community for anyone that codes to learn, share their knowledge, and build their careers.
More than 50 million unique visitors come to Stack Overflow each month to help solve coding problems, develop new skills, and find job opportunities.

They have an impressive list of Q&A's.

CodeWall says:

StackOverflow, a huge community of developers posting questions to be advised from other developers, it’s a stroke of genius.
Most developers will already of heard of this absolute gem. It’s on this list of tools because it is ultimately one of the best websites to use for gaining knowledge.

JSFiddle

JSFiddle runs code on the fly! Just add JavaScript alone to execute or add some CSS & HTML too.
JSFiddle will render your code to an output window. It’s even capable of saving versions of your code that you can repost or send to other people.

• Codepen CodePen is pretty similar to JSFiddle but each pen automatically generates website integration code that you can paste directly into your site.
• DB Fiddle. Don’t have a database on your device? Then this tool is the perfect solution, simply add some SQL Syntax wrapped around data to create a temporary table. From there you can execute SQL statements on the table’s data and await the result.
• DotNeD Fiddle fiddle allows multiple configurations in languages and project types. Choose from C#, F# and Visual Basic for the language and select the project type from the drop-down, for instance, MVC. After configuration, write and run your code against the dot net engine.