Contact Form 7, Because contacting you should not be a problem!
Lightweight and effective
No compatibility issues
Graphically, it does not offer many customizations, but in some situations it could be superfluous for a contact form
Here too we are facing one of the first plugins to install to create the classic Contacts page or the like. Just plug in and configure it very easy to create your contact form and copy it to your page or wherever you want!
Current Version (look at review date): 4.2
Author: Takayuki Miyoshi
You can find it on: WordPress.org or Contactform7.com