Some of those applications present in the top 100 include:
(a software program which allows its users to explore interactive, multi-layered maps of our entire planet.) Using this program, one can also explore the progressive changes that have occurred across the earth's surface over time.
(a free instant messaging service which allows people from various IM networks such as MSN, Yahoo Messenger, AIM, and GoogleTalk to chat with each other in an internet browser.)
(a web-community where people can showcase their brilliant photography/PhotoShop skills and receive comments from others for free.) Contests are also held in which people can enter their photos for the chance to receive a monetary prize. 
(a website from which people can access over 20 different work productivity programs, after signing up for free.) These products allow for the creation of written documents, spreadsheets, presentations similar to those Microsoft PowerPoint, and access to chat and e-mail, just to name a few.
(an interactive to-do list which is capable of sending the user timed reminders through Gmail, the iPhone, SMS, Skype, and various other compatible IM services.) This application can either be accessed through a free sign-up, or for a $25 annual fee, which provides access to new features and technical support.
