Open access is a publishing model for scholarly communication that makes research information available to readers at no cost, as opposed to the traditional subscription model in which readers have access to scholarly information by paying a subscription (usually via libraries).
The principles of open access are set out in the Berlin Declaration on Open Access to Knowledge in the Sciences and Humanities (2003).
You can find a high-quality open-access publisher by:
There is much debate around the benefits and risks of open access publications:
The Pros and Cons of Open Access Publishing
Open Access vs Traditional Journals: Pros and Cons