1. Magnific Popup
To make an image or gallery images open up in a popup (ex. Lightbox). Default in post/page – ON, with all JPG, PNG, GIF and BMP files. If you want to use it in the gallery – just select Link To Media File from dropdown in Gallery Settings:
And the result:
2. Add Link to External Website
Allows you to make a link to a URL of your choosing in a post. Just go to Add New Post or Edit Post and fill in Add Link To External Website box.
And that’s it! Your link will appear in desired post page: