Skymarket recommends the following products.

Web site Design: Macromedia Dreamweaver MX, Macromedia Flash MX
Web site design and graphical manipulation: Adobe Photoshop
Website uploads and downloads: Globalscape CuteFTP, Crystal FTP
The latest browsers: Internet Explorer, Firefox

Intrusion countermeasures are a vital tool in combating the proliferation of spam, viruses and spyware and probably the best known product on the market is called Ad-Aware.