I am addicted to working out my web projects with wordpress and that is because of its fantastic plugins.
In any range of content, form or application request you need to work on, wordpress has a suiting plugin.
I will just mention one I love that helps my Traffic keyword system in order words SEO approach; It is the WP SEO by YOAST; I leave the remaining space for readers on same platform to mention their wordpress rocking plugins
There’s obviously a lot of good ones out there but these are some of my favorites:
W3 Total Cache - prevents your site from crashing during high traffic. Really good plugin to have for any serious WPer.
MarketPress E-Commmerce - paid but cheap plugin for those looking to monetize their site.
Contact Form 7 - straightforward but valuable to have a contact form that works. I see a lot of these that simply don’t work.