Golf balls are expensive. Retrieving them is also expensive. The Golf Ball Wrangler ($120) makes the process of recovering golf balls easier and more efficient. The device is especially useful to retrieve balls from water ponds. It has been made from heavy duty fiber glass mesh to slice through any sea weed and cut through deep mud and can easily recover up to 25 balls in each pull.
Even though the Golf Ball Wrangler is already being sold in the US, it is still a concept waiting the be funded. If you'd like to contribute, feel free to check their project page on Kickstarter.
Here is a quick video that shows the Golf Ball Wrangler in action: