RPG players have several hosted RPG software solutions available on the internet, including Astral, Roll20, Beyond Tabletop, and more. It was clear that I needed a hosted instance of a D&D battle map.
While had some success with one player connecting to my MapTool instance, any more than that overwhelms my upload allowance. However, I've recently moved to a small town just 1,500 miles north of Antarctica, and the fastest internet available here is an ADSL connection.
It's a powerful application that makes my gaming life easy, private, and flexible. When one player moves her piece forward on her map, another player sees it on his. For years, I've used the excellent MapTool software, an open source client that runs locally on each player's computer and shares maps and miniatures among all. However, when you're playing online, you need digital maps and digital miniatures plus a way to share these components among all players.