Our website provides a free download of STOL Kit 1.0. The actual developer of the program is FlightSimTools.com. The program lies within Business Tools, more precisely Project Management. The following version: 1.0 was the most frequently downloaded one by the program users.
From the developer:
STOL Kit is a module for adding solid rocket motors and braking parachutes to FSX and FS9 airplanes. With this program you can specify attach points for rockets and parachutes for every individual airplane simply by pointing with the mouse and you can also freely choose key combinations for activating rockets and parachutes.
You may want to check out more software, such as Apitron PDF Kit Alternatives or Kite, which might be similar to STOL Kit.