AGI STK Software Licenses for Space Security and Defense Program supported by AFSPC/CC. Systems Tool Kit (STK) is Analytical Graphics, Inc.'s (AGI) flagship product supporting programs across their complete life-cycles, performing engineering analysis and visualization in concepts development, design engineering, test & evaluation, operations, and post operations analysis for STK technology can be embedded within software development efforts supplying commercial-off-the-shelf (COTS) computational components and situational awareness displays to operations systems.