Data analysts and data scientists work with large datasets and require effective data analysis tools. Nine powerful tools are used in the workplace for data processing, visualization, and reporting. KNIME is an open-source platform for data analytics and machine learning. OpenRefine offers data wrangling and transformation capabilities. RapidMiner, a SaaS platform, handles statistical analysis, predictive analytics, data mining, and machine learning. Orange provides visual programming for data analysis and machine learning. Google Fusion Tables enable data visualization with charts and maps. Tableau Public creates interactive dashboards and graphs. Gephi specializes in network and link analysis. Weka offers data modeling and mining. Zoho Reports synchronizes and analyzes data from web apps and databases, creating insightful reports.