Lately I converted to Gallery by Supsystic for image galleries on this WordPress site. It has a nice built-in light box feature for viewing individual images. When a user clicks on a gallery image, it is displayed in a light box that pops up in the foreground. User controls allow paging forward and backward through images as well as closing the light box to return to the gallery. Another advantage is that the pages display seamlessly on handhelds such as iPhone and iPad and look great. The plugin has lots of options that I have not begun to explore.
The tool that I have most often used for image editing is Photoshop CC. I’m using Lightroom CC a lot more since viewing this on YouTube. It is a great video that I found via a Flickr post. http://youtu.be/aG3Zc5gWSSg