Have you ever wanted to learn about something on the internet only to hit a paywall. A paywall only allows you to read the article if you pay money first. When I look for information on the internet, I depend upon free, full text, and quality controlled scientific and scholarly journals. The Directory of Open Access Journals provides this service.
The Directory of Open Access Journals covers all subjects and languages. There are now 2423 journals in the directory. Currently 709 journals are searchable at the article level. As of today 118178 articles are included in the DOAJ service.
Open access means I can "read, download, copy, distribute, print, search, or link to the full texts of these articles" Quality control means the journal must exercise peer-review or editorial quality control.