A question that is often asked about commercial software on the Linux platform is "why should I pay for something when I can get it for free?"
That's a pretty good question, actually, and it's certainly one that came up at the Stalker Software booth when the company first started showing up at LinuxWorld Expo. Visitors to their booth would look at the firm's flagship product, the messaging server CommuniGate Pro, and frequently ask that question. Sendmail, after all, could do much of the same thing for a whole lot less in cost.
Stalker must be doing something right, because despite this price-point hesitancy, Linux sales make up the majority of their revenue stream, over and above sales on the Windows and OS X platforms.
Last week, Stalker released another iteration of CommuniGate Pro, version 4.1, which brings more collaborative and messaging tools to the Linux platform.