Application Traditional Software Open Source
E-mail Microsoft Outlook
$900 per person per year
Zimbra
Free, plus $500 per person per year for support
Knowledge Management PeopleSoft
$100,000 a year
MediaWiki
Free
E-commerce IBM WebSphere
$500,000 per year, plus $300,000 per year in consulting fees
Interchange
Free, plus $100,000 in consulting fees
Database Documentum
$100,000 a year
PostgreSQL
Free
Operating System Microsoft
$130,000
Red Hat Enterprise Linux
Free, plus $50,000 for support

Totals

$1.2 million to $3 million $380,000