Open-source software can be found on the Internet, the best way to search anything on the Internet is to Google. There are also open-source directories like osdir and lot of blogs such as openSourceMantra on Internet providing reviews and information about open-source software.
SourceForge is one of the best repository for open-source projects. SourceForge is one stop shop for individuals or organizations who would like to host or evaluate any open-source software. SourceForge provides free hosting for open-source projects including mailing lists, source repositories, bugs database etc.
There are around 1,00,000 projects hosted on SourceForge, some of them may not fulfill exact requirement of SMEs as these projects are not tailor made, but most are successful and quality open-source projects which SMEs can start using with little or no customization in significantly less time.
As SourceForge provides statistics on each open-source project's activity and number of downloads, these statistics gives a fair understanding quality and popularity of a project also how many downloaded. So anybody can easily judge whether to evaluate or discard the project.
Sample screen shot of statistics of a project
Each project on SourceForge has support options like web-based discussion forums, email-based mailing lists, a support and bug management system called the Tracker system, and a web-based form that may be used to send email to project developers. If required SMEs can buy paid support for open-source software, through SourceForge's market place.
Where do we get open-source software?
