Bounty, airdrop, I think you should contact bountyhive,
http://bountyhive.io/, From my experience maybe over 1 years join many bounty champaign, the best way is bountyhive. Join with many manual bounty, also platfrom bounty but the best is Bountyhive. This is not endorse, Personal experience. I say this because their support is so great, even with over 20K members, he can handle it
The OP is looking for a software not a website for managing bounty campaigns which I think there is no such things because if there is a software that can be use to manage bounty campaigns then there is no need for bounty managers.