Open Access Journals (often called "gold" open access) are freely available and full text. Many of them are refereed scholarly and scientific journals. The Directory of Open Access Journals (DOAJ) offers an indexing of OA journals by title and by discipline. Many well known and respected journals are converting or modifying themselves to include OA options and are indexed by well-known research databases.
FREE, full text, quality controlled scientific and scholarly journals in all subjects and languages.
SCImago Journal & Country Rank
The SCImago Journal & Country Rank is a publicly available portal that includes the journals and country scientific indicators developed from the information contained in the Scopus® database (Elsevier B.V.). These indicators can be used to assess and analyze scientific domains.
An article reporting new and original research or findings written by the original researcher.
A scholarly journal publishes authoritative articles by academics or experts in a discipline. The articles usually undergo peer-review, that is they are evaluated by other experts before publication.
For more on the different types of periodicals:
Distinguishing Scholarly from Non-Scholarly Periodicals: A Checklist of Criteria from Cornell University Library