APT - The Astronomer's Proposal Tool Suite is the newest Suite of tools available for HST proposing.

Starview - StarView version 7 is an astronomical database browser and research analysis tool. Developed in Java, StarView provides an easy to use, highly capable user interface that runs on any Java-enabled platform as a standalone application.

OPUS - the Operational Pipeline Unified System. OPUS is the telemetry processing system currently operational at the Space Telescope Science Institute in Baltimore, Maryland. This system converts the incoming telemetry from the Hubble Space Telescope into standard output. OPUS software is based on the blackboard architecture and, as a result, is highly robust and portable.