There are multiple jury tools available for your Wiki Loves Monuments jury process. They are all listed at Commons' Jury tools. While each national contest is free to choose their jury tool of choice, the international team develops, maintains, and supports Montage if you decide to choose this jury tool.
Wiki Loves Competitions Tools: Provides per year and country level statistics about the number of uploads, number of uploaders, images uploaded and used in wikis, and the number of uploaders registered after the competition started. It also provides an overview of country level participation in WLM (as well as WLE).