WordPress Plugin: Pinterest Automatic Pin v4
Automatic Image detection: Pinterest Automatic auto detects images from your post then list them, where you can decide which images should be pinned.
Automatic boards detection: Pinterest Automatic will auto-detect boards in your Pinterest account so that you can choose which board you want to pin images to.
Queuing System: The Plugin queues images that are eligible for pinning in the queue and pin them separated by a random interval. That allows the pinning of unlimited number of images without any problem.