While the following list is neither comprehensive nor the only possible alternatives, we have focused on products we have tested and feel are a best fit as potential substitutes for software we typically find in our customer's offices.
In the Microsoft World
(runs only on Windows)
In the Open Source World
(runs on Windows or Linux or ?)
Windows (all versions)
Ubuntu 6.06 LTS
Office - Word, Excel, Powerpoint
OpenOffice - Writer, Calc, Impress
Outlook
Evolution, Thunderbird w/sunbird
Internet Explorer
Firefox
Quicken (personal finance)
GnuCash, Turbocash
Quickbooks (businance finance)
Quasar, SQL-Ledger
Windows Server
CentOS
Windows SBS Server
SMEServer
File & Printer sharing
Samba
Exchange mail server
Scalix mail server
For more information please visit the Open Source Initiative at www.opensource.org