Projects represent an inevitable part of the business, so it is important to devote a certain amount of time to their implementation. To make the process as simple and as successful as possible, project management tools, which facilitate and make the processes of planning, organizing and controlling the project more productive, have been developed. Among these tools are open source project management tools that will be the subject of this paper. The basic idea of open source software is very simple. Programmers or users can read, modify and redistribute the source code of the software. Although there are various open source software licenses, they all share a common idea that allows free sharing and use of information. The purpose of the paper is to identify the advantages and disadvantages of open source project management tools, and see to what extent they facilitate and improve the implementation of the project in order to make the final result as good as possible. The goal was to find one of the most up-to-date tools and see how it works, what features it offers and how easy it is to use. Theoretical background of project management information systems, project management tools and open source tools is provided through the method of analysis, synthesis and compilation. SWOT analysis describes some of the strengths, weaknesses, opportunities and threats of these tools, and in the example of the Coworking Zadar – Innovation through Collaboration project, the mode of operation of the selected OrangeScrum open source tool was tested. After the implementation of the project in the selected tool some advantages and disadvantages were noticed, but ultimately it proved to be a tool with satisfactory capabilities, which was easy to navigate and use.