DSTS Series: Free and Open Source Tools (CURL, ExamDiff, Leaflet)

Check back every week. We will share staff picks of some of our favorite free and open source tools!


Rick Allard
Systems Engineer

CURL  is a free command-line tool for use with HTTP servers and other protocols. The lead developer won a prize for his work. It comes with macOS and Linux. You can get it for Windows, too. Here’s one simple example: the -I switch. One thing it can tell you is the Last-Modified response header. If there’s no date on a web page, this can be useful. There are many uses beyond this example.


Mary Skubic
Library Technology Support Manager

ExamDiff is a tool for visual file and directory comparison. It is simple and easy to use. There are others for different platforms, but this one is for Windows. I have been using it for years to quickly compare differences in the daily patron load files.


Bill Winston

GIS Analyst

Leaflet is an open-source JavaScript library for mobile-friendly interactive maps. Leaflet allows you build interesting maps from code that can be shared on the web.

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