#5 WordPerfect

WordPerfect is a word processing application owned by Corel with a long history on multiple personal computer platforms. At the height of its popularity in the 1980s it was a dominant player in the word processor market. In the glory days of MS-DOS, the word processor to beat was WordPerfect, which spent the '80s leagues ahead of its competition, and managed to pack user-friendliness and power into a text-based environment. Its early popularity was also based partly on its availability for a wide variety of computers and operating systems, including Mac OS, Linux, Apple, Unix, AmigaOS and others.

The WordPerfect did not evolve fast and it took years for a stable Windows version of WordPerfect to appear. When it finally arrived, many of its most beloved keyboard shortcuts were overridden by Windows defaults.

#6 Sun Microsystems

Sun Microsystemssold computers, computer components, computer software, and information technology services and that created the Java programming language, and the Network File System (NFS). All the disparate products that Sun had put together over the years made it popular in dot com era; everybody wanted to power their new Websites with Java applications, SPARC servers, and Solaris.

The problem was, everyone was buying the stuff with fake bubble money, and they soon discovered they could run x86 Linux servers at a fraction of the cost, and Java, in which Sun had invested so many resources, was free to download. Oracle snapped up the diminished company in 2009.

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