DRAWaMAP is a Google Maps drawing application. The map is designed for mobile phone access but you can access it from your desktop as well.
The application allows you to draw lines, polygons, time polygons and map density quadtrees. It is also possible to change the colour and the weight of the lines drawn on the map. A really great feature of DRAWaMAP is that you can save a drawing to your Google MyMaps or open one of your saved MyMaps to work on.
The developer of the application says that there are even more features coming soon.
Scribble Maps is a fun map created using the Google Maps API for Flash. The map allows you to draw on Google Maps and is a quick and easy way to rapidly make and share your own maps.
Scribble Maps lets you draw shapes and scribble directly on top of a Google Map. You can also place markers and text, save your map as an image or send your map to friends. This is a great way to create a custom map if you don't want to dabble with the Google Maps API.
QuikMaps is a nifty DIY Google Maps tool. The map includes a "scribble" feature that lets you doodle right on your map. The "text label" feature is pretty neat too; enter a text label, then drag it over the spot on the map you want it on.
Add some nice looking map markers, save, then gen some code for your own blog or website.