There are quite a few topics that this meta meta resource has not covered in-depth or even at all. Any resource and meta resource recommendations for the following topics would be particularly appreciated:
Organizations supporting underrepresented groups in STEM. Additions can go under the eponymous page.
Lists of psychology and neuroscience conferences. Additions can go under the eponymous page.
Resources for learning free programming languages that are not currently in the Free Programming / Markup Stylesheets / etc Languages subsection, like Ruby, PHP, or Julia.
Experimental stimuli and online experiments. These areas aren't particularly lacking in number, but given how many experiments go on it's easy wonder just how big these two databases could grow.
Databases of research grants. The Opportunities section covers funding already but is tilted toward early-career opportunities. It would be great to include a free, comprehensive source for finding large grants.
Tools for performing meta-analyses.
Currently this web-book is disproportionately U.S.-centric. It would be quite helpful to more include resources from other parts of the world and in other languages, too.