NGC891 - Interactive Star Charts - Interactive star charts, with Messier, Caldwell and Herschel 400 objects. Downloadable as Excel spreadsheets or PDF charts. - http://www.ngc891.com
WikiSky - Provides an online interactive system. Includes articles, gallery, forum, and FAQ. - http://www.wikisky.org/
MyStarsLive - MyStars for Windows software to construct for any city. - http://www.relativedata.com/mod.php?mod=showinmain&vsize=1500&page=mystarslive/
Virtual Sky - Information, themes, features, uranometria, and a virtual sky blog. - http://virtualsky.org
Monthly Sky Maps - Sky charts for every location. - http://astroclub.tau.ac.il/skymaps/monthly/
Your Sky - Online planetarium gives three ways to view the sky and produce free sky maps. - http://space.about.com/library/weekly/blskymaps.htm
Star Gazer Guide - View a star map for any date, time and latitude, then click on stars for detailed information. - http://www.outerbody.com/stargazer/
Lunaria Lunar Almanac Sky Maps - Maps and tables designed for seven U.S. cities and updated weekly. - http://www.theskytonight.com/localsky.htm
Solar System Live - Interactive Orrery of the web with links to other software. - http://www.fourmilab.ch/solar/
The Dome of the Sky - Online planetarium showing views of the stars and constellations at different latitudes and different dates. - http://domeofthesky.com/foyer.html
3-D Starmaps - An attempt to assist science fiction fans and authors of science fiction novels who lack the knowledge to construct maps. - http://www.projectrho.com/starmap.html
Star Maps - Star maps generated for any city. - http://starmap.causeway.co.uk/
SolStation - On-line interactive 3D maps including software and support. - http://www.solstation.com
SkyMaps - Maps of the night sky for northern and southern hemispheres, designed to be printed and used, and updated each month. - http://skymaps.com/
Solar System Simulator - Collection of planetary and star maps. - http://maps.jpl.nasa.gov/
The Constellations and their Stars - Listings with information, images, sky charts, references, resources, and links. - http://www.astro.wisc.edu/~dolan/constellations/