Tools Screen presents the ability to use Google Gears to make WordPress work in a "Turbo" mode (discontinued in version 3.0, see below). In addition, the "Press This" bookmark tool and the Categories to Tags Converter are detailed.
There are various tools available in Wordpress and the most important is Yoast seo. Find below the important tools to use in wordpress:
1. Yoast SEO
2. Redirection
3. Sitemap Generator
4. WPForms
5. Monster Insights
6. Broken Link Checker
I think you are talking about Wordpress plugins, if you want to use a Wordpress plugin then you first need to install the chosen plugin for your website from Wordpress store and then need to activate. Right now i am working on an Indian Wordpress web development company where i am using several Wordpress plugin for different uses.