Open source software

Free and open-source software

(FOSS) is computer software that can be classified as both free software and open-source software.[a] That is, anyone is freely licensed to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software

NoSQL

A NoSQL (originally referring to "non SQL" or "non relational" [1]) database provides a mechanism for storage and retrieval of data which is modeled in means other than the tabular relations used in relational databases. NoSQL databases are increasingly used in big data and real-time web applications.[7] NoSQL systems are also sometimes called "Not only SQL" to emphasize that they may support SQL-like query languages.[8][9]

Apache HTTP Server

Apache is free and open-source software. The Apache HTTP Server is the world's most used web server software. Apache is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation. Most commonly used on a Unix-like system (usually Linux),[6] the software is available for a wide variety of operating systems besides Unix, including eComStation, Microsoft Windows, NetWare, OpenVMS, OS/2, and TPF.

MongoDB

MongoDB is free and open-source software, is a cross-platform document-oriented database. Classified as a NoSQL database, MongoDB eschews the traditional table-based relational database structure in favor of JSON-like documents with dynamic schemas (MongoDB calls the format BSON), making the integration of data in certain types of applications easier and faster.

Solr

Solr (pronounced "solar") is an open source enterprise search platform, written in Java, from the Apache Lucene project. Its major features include full-text search, hit highlighting, faceted search, real-time indexing, dynamic clustering, database integration, NoSQL features[1] and rich document (e.g., Word, PDF) handling. Providing distributed search and index replication, Solr is designed for scalability and Fault tolerance.[2] Solr is the second-most popular enterprise search engine after Elasticsearch.[3] Solr runs as a standalone full-text search server. It uses the Lucene Java search library at its core for full-text indexing and search, and has REST-like HTTP/XML and JSON APIs that make it usable from most popular programming languages. Solr's external configuration allows it to be tailored to many types of application without Java coding, and it has a plugin architecture to support more advanced customization. Apache Lucene and Apache Solr are both produced by the same Apache Software Foundation development team since the two projects were merged in 2010. It is common to refer to the technology or products as Lucene/Solr or Solr/Lucene.

Apache Software Foundation

The Apache Software Foundation (ASF) is an American non-profit corporation to support Apache software projects. The Apache Software Foundation is a decentralized community of developers. The software they produce is distributed under the terms of the Apache License and is therefore free and open source software (FOSS).

Apache CouchDB

commonly referred to as CouchDB, is an open source database. Unlike a relational database, CouchDB does not store data and relationships in tables. Instead, each database is a collection of independent documents. Each document maintains its own data and self-contained schema. An application may access multiple databases, such as one stored on a user's mobile phone and another on a server. Document metadata contains revision information, making it possible to merge any differences that may have occurred while the databases were disconnected.

PostgreSQL

often simply Postgres, is an object-relational database management system (ORDBMS)