YaCy is a free search engine that anyone can use to build search the internet (www and ftp) or to create a search portal for others (internet or intranet). The scale of YaCy is limited only by the number of users and can index billions of web pages. In p2p mode it is fully decentralized, all users of the search engine network are equal and it is not possible for anyone to censor the content of the distributed index.
Oneline provides simple, high performance platform for EC2,JDBC,Hadoop,S3,Solr,Flex, XSLT, J2EE,Windows Mobile SMS, Blog, Yahoo EMail, Google EMail, Others) and many more platform components.
MuSE-CIR is a Multigram-based Search Engine and Collaborative Information Retrieval system. Written in Java /JSP, supports any JDBC connectable database - thoroughly tested only with OracleXE, and somewhat with MySQL, JSP on Apache Tomcat 5.5
OpenOffice Search is a document indexer and search engine for OpenOffice documents. It is Java-based, so it will run on any J2SE enabled platform and uses an embedded Derby (Cloudscape) database.
Deploy in 115+ regions with the modern database for every enterprise.
MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
XQEngine is a Java component for searching collections of XML documents that uses an XQuery front end. The engine has a straightforward API that allows it to be easily embedded in end user applications. Requires some basic Java programming skills.