These systems allow for a player to create a character and carry said character through different adventures, with different groups and game masters, with the knowledge (or assurance) that the character will be compatible with the adventure and the content will fit the character.
While there are several excellent options available, Roll20 emerges as the best choice for running W5 due to its accessibility, robust features, and more.
Old-School Essentials uses the classic 6 stat array of Strength, Intelligence, Wisdom, Dexterity, Constitution, and Charisma. To determine your stats, roll 3d6 down the line.
Monster of the Week is a Ghosty, Buffy, Scooby Mulder-n-Skully-esque game all about solving mysteries and kicking supernatural butt. Here are the four best places to track down your monster-hunting crew.