UML HAB
The UMass Lowell High Altitude Balloon project (UML HAB) has created a reusable balloon payload for taking instruments to the edge of space! This system includes a hot wire cutdown mechanism, APRS/ground based tracking system and can be used with almost every parachute for any sized mission!
To create your own system or take a look at what we did, feel free to look through our public project folder.
For flight code, check out our Github code repository.