Projects that provide free content exist in several areas of interest, such as software, academic literature, general literature, music, images, video, and
engineering. Technology has reduced the cost of publication and reduced the entry barrier sufficiently to allow for the production of widely disseminated materials by individuals or small groups. Projects to provide free literature and multimedia content have become increasingly prominent owing to the ease of dissemination of materials that are associated with the development of computer technology. Such dissemination may have been too costly prior to these technological developments.
Media In media, which includes textual, audio, and visual content, free licensing schemes such as some of the licenses made by
Creative Commons have allowed for the dissemination of works under a clear set of legal permissions. Not all Creative Commons licenses are entirely free; their permissions may range from very liberal general redistribution and modification of the work to a more restrictive redistribution-only licensing. Since February 2008, Creative Commons licenses which are entirely free carry a badge indicating that they are "approved for free cultural works".
Repositories exist which exclusively feature free material and provide content such as photographs,
clip art, music, literature and news articles. logo Given sufficient interest in a software component, by using
peer-to-peer distribution methods, distribution costs may be reduced, easing the burden of infrastructure maintenance on developers. As distribution is simultaneously provided by consumers, these software distribution models are scalable; that is, the method is feasible regardless of the number of consumers. In some cases, free software vendors may use peer-to-peer technology as a method of dissemination. Project hosting and code distribution is not a problem for most free projects as
a number of providers offer these services free of charge.
Engineering and technology Free content principles have been translated into fields such as engineering, where designs and engineering knowledge can be readily shared and duplicated, in order to reduce overheads associated with project development.
Open design principles can be applied in engineering and technological applications, with projects in
mobile telephony, small-scale manufacture, the automotive industry, and even agricultural areas. Technologies such as distributed manufacturing can allow
computer-aided manufacturing and
computer-aided design techniques to be able to develop small-scale production of components for the development of new, or repair of existing, devices. Rapid fabrication technologies underpin these developments, which allow end-users of technology to be able to construct devices from pre-existing blueprints, using software and manufacturing hardware to convert information into physical objects.
Academia In academic work, the majority of works are not free, although the percentage of works that are open access is growing.
Open access refers to online
research outputs that are free of all restrictions to access and free of many restrictions on use (e.g. certain copyright and license restrictions). Authors may see open access publishing as a way of expanding the audience that is able to access their work to allow for greater impact, or support it for ideological reasons. Open access publishers such as
PLOS and
BioMed Central provide capacity for review and publishing of free works; such publications are currently more common in science than humanities. Various funding institutions and governing research bodies have
mandated that academics must produce their works to be open-access, in order to qualify for funding, such as the US
National Institutes of Health,
Research Councils UK (effective 2016) and the
European Union (effective 2020). At an institutional level, some universities, such as the
Massachusetts Institute of Technology, have adopted open access publishing by default by introducing their own mandates. Some mandates may permit delayed publication and may charge researchers for open access publishing. For teaching purposes, some universities, including , provide freely available course content, such as lecture notes, video resources and tutorials. This content is distributed via Internet to the general public. Publication of such resources may be either by a formal institution-wide program, or informally, by individual academics or departments.
Open content publication has been seen as a method of reducing costs associated with information retrieval in research, as universities typically pay to subscribe for access to content that is published through traditional means. Subscriptions for non-free content journals may be expensive for universities to purchase, though the articles are written and peer-reviewed by academics themselves at no cost to the publisher. This has led to disputes between publishers and some universities over subscription costs, such as the one that occurred between the
University of California and the Nature Publishing Group.
Education Open Educational Resources logo Free and open content has been used to develop alternative routes towards higher education. Open content is a free way of obtaining higher education that is "focused on collective knowledge and the sharing and reuse of learning and scholarly content." There are multiple projects and organizations that promote learning through open content, including
OpenCourseWare and
Khan Academy. Some universities, like
MIT,
Yale, and
Tufts are making their courses freely available on the internet. There are also a number of organizations promoting the creation of openly licensed textbooks such as the
University of Minnesota's Open Textbook Library,
Connexions,
OpenStax College, the Saylor Academy, Open Textbook Challenge, and
Wikibooks.
Legislation Any country has its own law and legal system, sustained by its legislation, which consists of documents. In a
democratic country, laws are published as open content, in principle free content; but in general, there are no explicit licenses attributed for the text of each law, so the license must be assumed as an
implied license. Only a few countries have explicit licenses in their law-documents, as the UK's
Open Government Licence (a compatible license). In the other countries, the
implied license comes from its proper rules (general laws and rules about copyright in government works). The automatic protection provided by the
Berne Convention does not apply to the texts of laws: Article 2.4 excludes the official texts from the automatic protection. It is also possible to "inherit" the license from context. The set of country's law-documents is made available through national repositories. Examples of law-document open repositories:
LexML Brazil,
Legislation.gov.uk, and
N-Lex. In general, a law-document is offered in more than one (open) official version, but the main one is that published by a
government gazette. So, law-documents can eventually inherit license expressed by the repository or by the gazette that contains it. == History ==