In a market overflowing with Internet-enabled applications, vendors increasingly are counting on the magic words "open source" to attract venture capitalist, partner and customer interest. But are software vendors using open source merely as a way to stand out from the crowd? Or do open source versions of applications merit consideration above and beyond the buzzword factor? There's no question that commercial versions of applications that are built in adherence to open source development procedures are proliferating. In order to qualify as a true open-source product, software is expected to be licensed under the GNU General Public Licence. Any changes made to the base source code by vendors, service providers and/or customers must be returned to the developer community. Do open source versions of applications merit consideration above and beyond the buzzword factor? A number of software vendors are relying on these open source principles to build and maintain their software and services offerings. Akopia, for example, is billing itself as "the world's leading provider of open source e-commerce software and services." OpenSales -- which rebranded itself on Wednesday as Zelerate -- is making an almost identical claim, saying it is "the leading provider of open source e-commerce applications". Long-time real-time operating system vendor Lynx Realtime Systems recently renamed itself LynuxWorks to reflect its focus on embedded Linux. And just about every enterprise computing vendor, from IBM to Hewlett-Packard, has found a way to jump onto the open source bandwagon as of late. Akopia, which last week announced an updated version of its Interchange open-source e-commerce platform, says it is betting on open source to be more than a mere product differentiator. "Akopia is, to business-critical apps, what Linux is to operating systems," said chief executive Brett Pinegar. "Open source makes our software easier to customise. We can do things more quickly, in terms of development, deployment and customisation. And there are shorter development, debugging and testing cycles," Pinegar said. Akopia's Interchange currently runs on Linux, Unix and FreeBSD. Pinegar said there are "some initiatives underway" to move the product to Windows, but the company first needs some Perl upgrades, as well as some Windows customer interest. Akopia plans to make money both through selling Interchange and by providing managed and life-cycle services around the product. Zelerate, which also markets an open source e-commerce suite called AllCommerce, cites similar benefits stemming from its open source heritage. The company was founded in 1998 by a former eToys vice president who found open source to be the most stable and reliable way to develop and deploy software, according to a company spokesman. AllCommerce runs on Linux, Solaris and Windows NT. Zelerate doesn't charge for its software, but instead is making money from services. The company is planning to introduce an open sourced warehouse management product early next year. Take me to the Linux Lounge Take me to ZDNet Enterprise To have your say online click on the TalkBack button and go to the ZDNet News forum. Let the editors know what you think in the Mailroom. And read what others have said.