Here's what we've got for you in the GMap.NET category.

• GMap.NET Beginners Tutorial: Adding polygons and routes to your map (updated for VS2015 and GMap.NET 1.7)
• GMap.NET Beginners Tutorial: Adding clickable markers to your map (updated for VS2015 and GMap.NET 1.7)
• GMap.NET Beginners Tutorial: Maps markers, polygons and routes (updated for VS2015 and GMap.NET 1.7)
• GMap.NET Tutorial: Calculating the area of a polygon on the map
• GMap.NET: Getting rid of the red cross in the middle of your map
• GMap.NET Tutorial: Routes
• GMap.NET Tutorial: Maps, markers and polygons