Extend Studio has Masonry Gallery Pro extension that I have been using on several sites with good success (also includes an admin for clients to upload their own images/galleries). Sadly got the below email that Extend Studio is no longer supporting their extensions or developing new ones, but you can download all of them for free. So here is a good opportunity to give them a try:
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Starting July 1st 2020, we will no longer be selling and supporting the Adobe Dreamweaver extensions that were previously available on extendstudio.com.
All our Dreamweaver extensions will be available for free here:
https://extendstudio.com/dreamweaver-extensions/
However, they will no longer be updated or supported.
Over the past two years these products haven't received enough attention from us simply because of the shrinking market and the low revenues they generated. So it was a natural decision to discontinue this line of products and focus on areas with more growth potential.
We hope you enjoyed using our products and we thank you for being our customers.