PlunkIt Mac - Version 1.0 PlinkIt! is the premier cross-platform, private and secure file transfer utility for your office. Instantly send files on your local network. Plunkit! uses peer-to-peer technology and unlike public file transfer systems, does not rely on Internet servers. Plunkit! increases security and productivity as there is no risk of sending or receiving files from outside your office. Seamlessly connects Mac and Windows computers on your LAN or WAN!