Diaspora (stylized DIASPORA*) is a free personal web server that implements a distributed social networking service. Installations of the software form nodes (termed "pods") which make up the distributed Diaspora social network.

The project was founded by Dan Grippi, Maxwell Salzberg, Raphael Sofaer and Ilya Zhitomirskiy, students at New York University's Courant Institute of Mathematical Sciences. The group received donations in excess of $200,000 via Kickstarter. A consumer alpha version was released on November 23, 2010.

Diaspora is intended to address privacy concerns related to centralized social networks by allowing users set up their own server (or "pod") to host content; pods can then interact to share status updates, photographs, and other social data. It allows its users to host their data with a traditional web host, a cloud-based host, an ISP, or a friend. The framework, which is being built on Ruby on Rails, is free software and can be experimented with by external developers.

A diaspora (from Greek διασπορά, "scattering, dispersion") is "the movement, migration, or scattering of people away from an established or ancestral homeland" or "people dispersed by whatever cause to more than one location", or "people settled far from their ancestral homelands".

The word has come to refer to historical mass-dispersions of people with common roots, particularly movements of an involuntary nature, such as the expulsion of Jews from the Middle East, the African Trans-Atlantic slave trade, the southern Chinese during the coolie slave trade, or the century-long exile of the Messenians under Spartan rule.

Recently, scholarship has distinguished between different kinds of diaspora, based on its causes such as imperialism, trade or labor migrations, or by the kind of social coherence within the diaspora community and its ties to the ancestral lands. Some diaspora communities maintain strong political ties with their homeland. Other qualities that may be typical of many diasporas are thoughts of return, relationships with other communities in the diaspora, and lack of full assimilation into the host country.

Computer software, or just software, is a collection of computer programs and related data that provides the instructions for telling a computer what to do and how to do it. Software refers to one or more computer programs and data held in the storage of the computer for some purposes. In other words, software is a set of programs, procedures, algorithms and its documentation concerned with the operation of a data processing system. Program software performs the function of the program it implements, either by directly providing instructions to the computer hardware or by serving as input to another piece of software. The term was coined to contrast to the old term hardware (meaning physical devices). In contrast to hardware, software "cannot be touched". Software is also sometimes used in a more narrow sense, meaning application software only. Sometimes the term includes data that has not traditionally been associated with computers, such as film, tapes, and records.