SeaMonkey – Web-browser, IRC chat client, advanced e-mail and newsgroup client and HTML editing made simple – all your Internet needs in one application brought to you by Mozilla.
SeaMonkey is a free, open source, and cross-platform Internet suite. SeaMonkey is the continuation of the former Mozilla Application Suite, based on the same source code

Here are some key features of “Sea Monkey”:

•    Browser (“Navigator”)
•    Tabbed browsing gives you a better way to surf the net. You no longer have to open one page at a time.
•     Popup blocker lets you surf the web without interruption from annoying ads.
•     Image Manager lets you block images to remove offensive images or speed up the rendering of web sites.
•    Find as you type gives you another way to navigate a page. Just start typing to jump from link to link or to find a word or phrase within a page.
•     Plus all the features a modern browser should have including: Advanced security settings; Password, Download, and Cookie managers; Themes; multi-language and multi-platform support; and, the latest in Web Standards.
•     Mail & Newsgroups
•    Junk mail controls helps you take back control of your e-mail from spammers.
•    Manage your mail with customizable Labels and Mail Views. Color code your e-mail to help you prioritize.
•    Multiple Accounts support helps you manage all your mail through one interface.
•    SeaMonkey Messenger includes Enterprise ready features such as S/MIME, return receipts, Address Books, LDAP support, and digital signing.
•    Composer
•  SeaMonkey’s powerful yet simple HTML editor keeps getting better with dynamic image and table resizing, quick insert and delete of table cells, improved CSS support, and support for positioned layers.
•    IRC Chat (“ChatZilla”)
•    Chat on IRC networks with this simple yet powerful IRC client.
•    You can change the look and feel of the chat with motifs; choose from several built-in motifs, many more downloadable, or create your own with CSS.