• 2MASS
• Cosmic Background Explorer (COBE)
• IRAS Archive Interface
• Wisconsin H-Alpha Mapper (WHAM)
• QMAP
• MAT
• Anglo-Australian Observatory surveys and catalogues page
• ESO Online Digitized Sky Survey
• Web interface to relational databases (WDB)
• Minnesota Automated Plate Scanner (APS)
• STScI Catalogs and Surveys Branch

The Southern Sky

• Parkes Catalogue of Radio Sources (PKSCAT90)
  
• PMN (Parkes-MIT-NRAO) 4.85 GHz Survey
• Accurate positions, fluxes and structure for the stronger PMN sources (PDF file)
• Parkes Neutral Hydrogen MULTIBEAM surveys (21cm)
• ATCA CMB anisotropy survey (8.7 GHz)
• 2.4 GHz Southern Galactic Plane Polarimetric Survey (at MPIfR-Bonn)
• Sydney University Molonglo Sky Survey (SUMSS - 843 MHz)

The Northern Sky

• NRAO VLA Sky Survey (NVSS - 1.4 GHz) (maps, catalog)
• VLA FIRST Survey (1.4 GHz) (maps, catalog)
• UMRAO Database
• The Westerbork Northern Sky Survey (92 cm)
• Galactic Plane A survey at 8.35 and 14.35 GHz
• Mullard Radio Astronomy Observatory (MRAO)
• Canadian Galactic Plane Survey Project (CGPS) at DRAO

The Whole Sky

• COMRAD All-Sky Compendium of Radio Sources
• Aitoff Projection of the Radio Sky at 4850MHz
  (combined images from the 87GB and PMN Surveys)
• The survey sampler at MPIfR

• Universe at your desktop
• NASA Astrophysics Data System (ADS) Data Catalogs
• NASA Astronomical Data Center (ADC)
• National Space Science Data Center (NSSDC)
• NCSA Astronomy Digital Image Library
• Radio Reference Frame Image Database (RRFID)
• Australia Telescope Databases
• SkyView Virtual Observatory
• NED - NASA Extragalactic Database
• SIMBAD on the Web
• BSAX-ASDC catalogues browser
• The MultiWavelength Sky
• Metsahovi 22, 37, 87 quasar monitoring
• UMRAO AGNs monitoring program (4.8, 8.0, 14.5 GHz)
• NRAO-GBI monitoring program (2.25, 8.3 GHz)
• Green's SNRs catalogue
• CATS (SAO) catalogues