Every website is different, the plugins needed and nature of the install for WordPress will change based on the project. However, as a base line here are the plugins we recommend and install on the websites we build.
In our opinion the essential plugin for search engine optimization. Easy to use and effective.
Helps prevent spammers from accessing and compromising your website.
Helps lock down any security risks when installing WordPress.
Stops repeated login attempts to your website and can also block certain IP’s that repeatedly try to login without the right credentials.
W3 Total Cache
The fastest and most complete WordPress performance optimization plugin. After you use the w3 total cache plugin you won’t go back to using WP Super Cache.
There are a lot more plugins out there, but we tend to keep out base line install small and only install essential plugins. This helps keep your website faster and more secure.