The following freely available tools may help you to visualize your data.
Excel – Good for handling data in spreadsheets and creating graphs and charts.
Gephi- open-source and free visualization and exploration software.
Nvivo - organize and analyse unstructured or qualitative data such as interviews, open-ended survey responses, journal articles, social media and web content.
Sci2 Tool - temporal, geospatial, topical, and network analysis and visualization of scholarly datasets at the micro (individual), meso (local), and macro (global) levels.
Tableau Public- create interactive data visualizations for the web from spreadsheet data.
Voyant Tools – web-based reading and analysis environment for digital texts.