• Wide Field/Planetary Camera 2 : UV/visible imaging camera with four 800x800 CCDs, covering a field of roughly 2.5 arcminutes
• Space Telescope Imaging Spectrograph
• Near Infrared Camera and Imaging Spectrograph
• Faint Object Camera
• Fine Guidance Sensors

Previous instruments:

• Wide Field/Planetary Camera
• Goddard High Resolution Spectrograph
• Faint Object Spectrograph
• High Speed Photometer

Upcoming instruments:

• Advanced Camera for Surveys
• Cosmic Origins Spectrograph
• Wide Field Camera 3