Many RPG players have migrated over to virtual tabletop (VTT) software during the pandemic. These tools often include multi-person connectivity, drawing features, token movement, and image import. If you want something simple, try out Owlbear Rodeo or Tableplop. If you want 3D, Talespire and Tabletop Simulator are the top two. For the largest feature set for 2D, try FoundryVTT. If you're running official Wizards of the Coast adventure modules, Roll20 and Fantasy Grounds have licenses to sell pre-made content on their platforms, so they'll be ready to go in less time.
Industry giant. It's been around a while, and has lots of supported RPGs.
2D, top down, browser-based. Free, with premium paid features.
Has licensed official WotC adventure modules.
Integrate D&D Beyond with Roll20 and Discord using Beyond20.
"The Roll20 killer you should be using" - Cyanomys
2D, top down, browser-based. Free, with paid premium features.
Recently partnered with DriveThruRPG to allow users to import all of their purchased content.
Smooth, intuitive interface. Lots of useful features.
Heavy community involvement, with frequent updates.