Bogo is solid, reliable and conflict-free multilingual plugin. It duplicates your post and uses URL Rewrite to serve the correct translation.
If you think Yoast is good, then you will be blown away with this plugin. Read more to learn why and how to migrate your SEO settings.
There will always be a case in which the widget or the addons you are using does not match your required design.
W3 Total Cache is one of the best caching plugin, unfortunately a lot of people are intimidated by the complex setting. This article will guide you to do that.
Contact Form 7 (also known as CF7) is one of the oldest plugin in the market. Just like the name suggests, it is used to create a contact form.