What can be done?

Move from Move To
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NT/W2K Server Linux/OpenBSD with SAMBA

IIS/ASP Apache/PHP

SQL Server DB2/Oracle/MySQL

.NET MONO

Visual BASIC/ActiveX Java

MS-Office Open Office

Lotus Notes TWiki

Exchange Server Sendmail/QMail

Internet Explorer Netscape/Mozilla

Citrix Winframe X-Server

Any other ideas for switching?