Open Journal Systems - OJS [PKP]
Open Journal Systems (OJS) is an open source journal management and publishing system. OJS assists with every stage of the refereed publishing process, from submissions through to online publication and indexing. Through its management systems, its finely grained indexing of research, and the context it provides for research, OJS seeks to improve both the scholarly and public quality of refereed research. OJS is open source software made freely available to journals worldwide for the purpose of making open access publishing a viable option for more journals.
free of cost
GNU/GPL (General Public License)