I think there are a lot of things.
I am ignorant of these things, but have come up with something on my own. I make grids/maps in powerpoint and put in symbols for players/items/baddies. I then import the slides into google docs. My players move their icons to where on the map they want to be, put markers on the baddies to indicate marking status and such, and you save the file if you have to leave and all of the markers are in their same place as before.
A little crude, but I think it works. It is better than nothing (for online stuff).