MaxiBlocks

I picked this up on it's first run and it's proven to be a brilliant purchase. At tier 1 you can install this on UNLIMITED sites!

You'll need to get used to the full site editor system WordPress has introduced, MaxiBlocks helps make that system a little easier to use with thousands of pre-defined design elements you can quickly drop onto your website.

I've done a video walkthrough: https://www.youtube.com/watch?v=Esf0rEfl5-k

The team have been consistent in rolling out updates and have been helpful when I've sent them messages.

If you're a WordPress user this is the easiest decision you'll make given the low price.