UPDATED ON: December 23, 2016
Mozilla Seamonkey is an all-in-one internet application from Mozilla
SeaMonkey is the all-in-one internet application suite formerly known as the Mozilla Application Suite, containing a Web browser, a mail and newsgroups client, an HTML editor, Web development tools, and an IRC chat client in a single software package.
The SeaMonkey Suite
SeaMonkey has inherited the successful all-in-one concept of the original Netscape Communicator and continues that product line based on the modern, cross-platform architecture provided by the Mozilla project.