McMaster University Open Access Interactive Tool: An interactive tool to help researchers comply with Canada's new Tri-Agency Policy on Open Access.
Open Access Button: The Open Access Button is a grassroots initiative that provides an easy way to support OA in your everyday work. Just add the button to your browser and click when you encounter a paywall. OA Button will search for open access versions of the paywalled article. If none are found, OA Button emails the authors to ask them to make a copy available.
Directory of Open Access Journals: Not sure if a journal is open access? Check the DOAJ, an online directly cataloguing open access journals.
COAPI: Coalition of Open Access Policy Institutions
Overleaf: a tool for writing and collaborating research papers
Open Library of Humanities: gold open access, peer-reviewed, not-for-profit academic platform for publications in the humanities
SHERPA/RoMEO: useful database of publishers' policies on copyright and self-archiving
arXiv: Cornell University Library e-print archive
GitLab.org: collaborative code-writing tool
Dataverse Network Project: archival repository software that promotes data sharing, persistent data citation, and reproducible research
Dryad: digital data repository
FigShare: research output repository
PeerJ: open access mega-journal
Impactstory: a modern day scientific CV for describing your impact in the research community (citations, tweets, shares)
Altmetric: measures # of online mentions of a scholarly paper in attention from newspapers, blogs, social media, and more.