Keyboard and Paper

You know how to set up a Minecraft server and want to host an adventure absolutely free?
Then this little project of mine might be the right thing for you!

No assets are included, but images can simply be added by providing a URL to that image (only .png and .jpeg/.jpg are supported) so you can host any campaign you have images for.

If you just want to join a running session, check out K&Ps Web version:
http://firebon.de/

Features:
-A help menu in game will teach you everything there is to know about the application
-Full light control with walls and spotlights
-DM can set his own light level
-Build in dice
-Battle UI that sorts by initiative to keep track of enemies
-Pointer to show your plans
-Live movement of objects
-Multiselect with shortcuts for battles or deleting objects
-Easily move and scale maps to fit them  to your characters
-Edit multiple objects at once
-Change color of character frame (for status conditions)
-Show or hide Grid on Maps
-Helper to align map grid to game grid
-Get distance between 2 points to check range
-Move all players cameras to DM position

When hosting, a server is started on port 7777. You can use a VPN like LogMeIn hamachi or port forwarding to let people outside of your network join . Local players can enter by using your local IP, which is displayed in game when hosting.

Apple BEWARE!!!
I don't own an Apple device, so the features are made for android and windows. A friend of mine, who is also our Game Master, does use apple and hasn't had any problems.