DataWrangler – interactive tool for data cleaning and transformation.
OpenRefine – desktop tool for cleaning and transforming data.
Google Colab - a collaboratove coding environment run by Google.
JSON View - tool for viewing JSON data.
JSON editor - Tool for editing JSON strings.
JSON online editor - code editing service.
GeoJSON.io - tool for retrieving geoJSON data.
GeoJSONlint - tool for validating geoJSON data.
CSVKit – a suite of powertools for working with Comma-separated values (CSV) files (command-line based).
Tropy - data management system for archival research.
Zotero - tool to organize all of your references and citations.