Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Google Scholar - Google Scholar is a freely accessible web search engine that indexes the full text of scholarly...
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
Google Custom Search - Google Custom Search enables you to create a search engine for your website, your blog, or a collection of websites.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
ResearchGate - Access scientific knowledge, and make your research visible