Which Software Do You Need A Captcha API For?

Hi guys, can you help us out here please?

We (the makers of SpinnerChief) are ready to release our new all-human captcha solving api, but we need to contact developers to request that they add the api first. What are the most popular softwares that utilise captcha-solving?

SEnuke XCr, Ultimate Demon, GSA Search Engine Ranker, Licorne AIO, Zennoposter.

Check the BST there's probably more I'm forgetting.

Thank you, myownhero, any more guys?