Add new tools

[enBonnet]

This is an open repository of tools for frontend developers, everyone is invited to add the tools, resources or more elements they use as frontend developers, in case you want to add a tool that does not fit in any defined section you can create a new section.

The only rule is that it should not be repeated

Steps:

• Fork this project
• Clone
• Edit Readme file (adding your suggestion)
• PR