Create color schemes, particularly for maps. Includes filters for color blindness and printing.
Create color schemes for data with lots of classes
OpenRefine (AKA Google Refine)
A program that helps you clean up data
A command line tool that lets you run SQL queries on a CSV
A simple browser application for mashing up images, shapes and text
A powerful, open source graphics editing program. Comparable to Adobe Photoshop.
A powerful, open source vector graphics editing program. Comparable to Adobe Illustrator.
PostGIS-based webmapping platform
JavaScript library for accessing CartoDB services
Interactive, open source, JavaScript mapping library
Create vector tile styles
An extension of Leaflet that allows you to access Mapbox services and, in some cases, simplifies some Leaflet logic. Lots of great examples in the documentation.
Create custome map tiles
A side-by-side frame comparison tool for static images.
Create simple, interactive story maps with a basic Google Spreadsheet backend. Also has an image annotation mode!
Create interactive, mult-media timelines
A civic tech company that produces tools for interactive mapping and data manipulation. Many of their tools are open source.
Knight Lab (Northwestern University)
An extension of the Medill School of Journalism, Media, Integrated Marketing Communications and the McCormick School of Engineering & Applied Science at Northwestern University. They make great storytelling tools that are pretty easy to use.
Lots of tutorials and tips for data-driven storytelling. Based out of the Media Innovation Program at Northeastern University.