Due to rapid development in the recent years, free software has become more and more important on the software market. For this reason free software replacing copyright software was surveyed. The results of an analysis of free software usage in Slovenian wood companies revealed that some companies already use free sotware, especially servers' applications. The degree to which information solutions used in wood companies are developed enables a relatively simple migration on mail, web and directory servers, as well as the replacement of office software. On the basis of our analysis, a replacement table of copyright software by free software was made; and an algorithm to introduce free software for servers' systems was prepared.