The paper describes a concept of software tools for data stream processing. The tools can be used to implement parallel processing systems. Description of the task is presented in the first part of paper. The system is based on pipeline parallelism and was distributed for using on a cluster computer. The paper describes a base scheme and a main work algorithm of the system. An actual application example is presented. The system has some weak sides which are described at the end of paper. Direction of future research is presented at the end of the article.