Inkscape Draw Isometric Hexagon. Here is workflow tutorial on creating a simple isometric block using inkscape, and then using that block to make a little landscape scene. Select both hexes and group them.
Set the units to whatever is appropriate and the values to the width and height of your page. The free open source software inkscape has a very robust feature that lets you create tiled patterns. Learn how to create simple isometric blocks and create a scene.