Ada: A Journal of Gender, New Media, and Technology https://adanewmedia.org/ (open access)
Assuming Gender. An Online Academic Journal from Spring 2010 to present in Freely Accessible Arts & Humanities Journals (open access)
Gender & behaviour (1596-9231) 12/01/2008 to present in ProQuest Central
If you have a citation or even just part of a citation, such as the DOI or ISSN number, you might use the Citation Linker to find your article.
Google Scholar can also be a good place to find a known citation. Here's a video to help you make the best use of this great resource