Sourcegraph - Sourcegraph is a free, self-hosted code search and intelligence server that helps developers find, review, understand, and debug code. Use it with any Git code host for teams from 1 to 10,000+.
ScienceDirect - ScienceDirect provides subscription-based access to a large database of scientific and medical...
Atlassian Fisheye - With FishEye you can search code, visualize and report on activity and find for commits, files, revisions, or teammates across SVN, Git, Mercurial, CVS and Perforce.
Springer Link - Springer Link is a website offering access to millions of articles, research papers, books, and journals to researchers and students.
Text Sherlock - Provides a fast, easy to install and use search engine for text but, mostly for source code.
Sage Journals - Sage Journals is a web application where you can find journals on virtually any topic.