Weboldalak változásának jelzése

Page Update Checker 0.3.1: https://addons.mozilla.org/en-US/firefox/addon/920

Check4Change: https://addons.mozilla.org/en-US/firefox/addon/3028


SiteDelta: https://addons.mozilla.org/en-US/firefox/addon/4337

http://www.trackle.com


http://www.wisdomchange.com


http://chikaboo.frac.dk


http://www.sitespector.com


http://www.internetowl.com

http://www.changedetection.com/

http://www.trackengine.com

http://www.watchthatpage.com 

http://www.infominder.com

http://www.changedetection.com/monitor.html

http://www.tracerlock.com

http://www.telatra.com/products.html

http://www.changedetect.com

http://www.aignes.com

http://www.copernic.com/en/products/tracker/

http://activeurls.com/en

http://www.urlywarning.net

http://www.feedwhip.com

Forrás: stevenbell.info, saját gyűjtés