The Open Access movement was developed by scholars who wanted articles and other research materials openly available on the web. Through cooperative organizations, these groups are trying to change how scholarly research is published. They are encouraging scholars and researchers to allow their work to be made available on the web and to consider using Creative Commons to denote copyright limits, to allow for more sharing of information.
As a result of this movement, some information that was previously only available to a limited number of people, due to monetary constraints, can now be made available to anyone with internet access.
A video from Karen Rustad explains Open Access
Some examples of Open Access initiatives are:
SPARC, developed by the Association of Research Libraries