Ok so on DL191 You went all big on Fantasy Grounds and while I appreciate them updating their software to work better on Linux, it is still propriety software and does require an account to use.
As an alternative to this I would like to point out Rolisteam. an open source RPG virtual table top application with features such as custom character sheets, import maps and markers, play background and incidental audio and a very very sophisticated dice rolling engine.
Here are a few screenshots for reference.
Please consider highlighting this also as they could do with more awareness and have only recently been taken under the umbrella of the KDE Games Development program