RAWGraphs — Data visualization framework sits between spreadsheets and graphics editors.
IPA (Innovations for Poverty Action) — Non-profit research and policy organization — famous for conducting randomized controlled trials (RCTs) in a lot of environments.
MicroMasters — Course in 'Data, Economics, and Development Policy' from MIT's Banerjee and Duflo.
Distillery — Simplify geoJSON to suit your needs.
Mapshaper — Tools for editing geospatial vector data.
R — Software programming language and software environment for statistical computing and graphics.
Tableau — Data visualization and business intelligence software (with built-in mapping charts and widgets).
TDH Mobile Data Collection Toolkit — Mobile data collection toolkit from Terre Des Hommes.
Steve Song's Awesome Connectivity Info — List of connectivity indexes and reports to help you better under who has access to communication infrastructure and on what terms.
Open Data Institute — Works with companies and governments to build an open, trustworthy data ecosystem, where people can make better decisions using data and manage its harmful impacts.
Humanitarian Exchange Language (HXL) — A data standard, designed to improve information sharing during a humanitarian crisis without adding extra reporting burdens.
Ona — Social enterprise with a data collection app.
RapidPro — Open-source data collection SMS platform.
Tangerine — Electronic data collection software designed for use on mobile computers, including netbooks, tablet computers and smartphones.