What are some alternatives?
When comparing DuckDuckGo and SciDaVis, you can also consider the following products
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
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
StartPage - Startpage search engine, the new private way to search Google. Protect your Privacy with Startpage!
Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...
Bing - Bing helps you turn information into action, making it faster and easier to go from searching to doing.
GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.