|A map made with Hexfriend
It has several features that somewhat surprised me for an online program. Besides being able to choose the size of the map, you can choose whether to have a classic rectangular map or a hexflower style map. You can have the hexes either flat top or pointed. Coordinates on or off and one of four styles. The tiles and icons are reminiscent of the classic TSR maps of yore. And, theoretically, you can import your own tiles and icons. I know there is at least one set for sale on DriveThru.
One downside to it is that there isn't layering other than the automatic layering between terrain, icons, rivers/roads and text. Also, the icons are fairly limited. On the upside, the icons are scalable in size.
But, if you want any easy online mapping program you might like Hexfriend. You can find it here.