I would like to share with you the top 5 plugins that I use on each WordPress website that I build :
1.Digg Digg – http://wordpress.org/plugins/digg-digg/
With Digg Digg by Buffer, you have an all in one social sharing plugin for your blog. Display all social sharing buttons nicely on your blog and make it look amazing, just like Mashable.
2.Contact Form 7 – http://wordpress.org/plugins/contact-form-7/
For those of you who are looking for some extra customization but doesn’t want to spend money on premium plugins like Gravity Forms, then Contact Form 7 is definitely a good choice. It is easy to setup and users are able to create multiple forms. You can easily place the forms using the designated shortcodes on nearly anywhere on your website.
3. WordPress SEO – http://wordpress.org/plugins/wordpress-seo/
When it comes to SEO, Yoast SEO plugin is already a household brand. This plugin offers great mobility and customizations especially with on-page SEO.
4.W3 Total Cache – http://wordpress.org/plugins/w3-total-cache/
If you are finding ways to reduce your website loading speed, then this is one plugin you can’t miss. With this plugin, you can easily minify and optimize your website without touching a single line of code.
5. Mailpoet – http://wordpress.org/plugins/wysija-newsletters/
Create newsletters, post notifications and autoresponders. Drop your posts, images, social icons in your newsletter. Change fonts and colors on the fly. Manage all your subscribers. A new and simple newsletter solution for WordPress. Finally!