httphotos is a software you can download and install for free: it's a freeware.
Web templates are included with httphotos. No need to install third party plugins.
Usage of httphotos follows a natural process:
1. You select the photos you want to show
2. You enhance some photos with luminosity, contrast, ... (Optional)
3. You select and customize a web template (Optional)
4. You press a button to create your online photo gallery