What are some alternatives?
When comparing GeoGebra and DuckDuckGo, you can also consider the following products
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Google - Google Search, also referred to as Google Web Search or simply Google, is a web search engine developed by Google. It is the most used search engine on the World Wide Web
Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...
StartPage - Startpage search engine, the new private way to search Google. Protect your Privacy with Startpage!
SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.
Bing - Bing helps you turn information into action, making it faster and easier to go from searching to doing.