The Space Telescope Science Institute developed the Spike planning and scheduling software in support of the Hubble Space Telescope as a general toolkit for planning and scheduling under Contract NAS5-26555 with the National Aeronautics and Space Administration. It is our desire that this toolkit be used to promote scientific research through the effective and efficient use of ground- and space-based astronomical observatories. By providing the Spike system to other facilities, we are developing a community of users who use and enhance the Spike system. The STScI is a clearinghouse for users, bug fixes, modifications, etc. Spike is a general framework for planning and scheduling.