Airpup is a small kite balloon designed to provide a steady aerial platform in winds from 0-20mph. Lightweight construction and a novel kite shape allow Airpup to use 40% less helium than spherical balloons while also flying in much higher winds, and a rail-mount system makes payload management simple.
A Crowd Supply campaign for Airpup gives a good overview of capabilities and led to a small production run. Because demand has been limited, Airpup is currently only available as a custom order for projects that support ongoing development.
Airpup is open hardware. Collaborators and replication are invited. More blog posts about Airpup.