If you're new to working with raw data, consider these tools as a starting place.
(For an extensive list of data tools for digital humanities, check out DIRT Digital Research Tools).
InfoVis RGraph - used for the In Her Own Right Subject Guide Visualization! A coding-based tool for creating interactive visualizations to share on the web.
Palladio - simple software tool for exploring and visualizing complex data sets in multiple ways, such as networks, maps, and image galleries.
Gephi - open source software for exploring and visualizing networks within complex data sets. Check out this excellent intro video by University of Kentucky Libraries to learn more.
Voyant Tools - web-based reading and analysis environment for digital texts.
TimelineJS - create a timeline from spreadsheet data.
StoryMap - combine images and maps to tell stories.
Google My Maps - create and share maps.