Bit Byte conversion - Base 2 conversions. Convert bytes to kilobytes and back etc..

www.onlineconversion.com - Website has many general and scientific conversion pages

www.whatismyip.com - Returns the external IP address of your network

www.timeanddate.com - Determine the local time and date of cities around the world

Online Periodic Table of the Elements

ISO Country Codes - List of the two letter country codes used for storage

www.filext.com - File extension lookup. Determine the program that uses a given file extension

www.time.gov - Determine present United States time