The Directory of Open Access Journals ... covers free, full text, quality controlled scientific and scholarly journals. We aim to cover all subjects and languages. There are now 2417 journals in the directory. Currently 709 journals are searchable at article level. As of today 118146 articles are included in the DOAJ service.
The psychology section lists 56 journals, though some of our favorite open access journals such as the Journal of Vision are listed elsewhere (in this case, under medicine -- opthamology). It might be better if it was possible to list resources under more than one heading.
Speaking of open access journals:
"If you've made up your mind to test a theory, or you want to explain some idea, you should always decide to publish it whichever way it comes out. If we only publish results of a certain kind, we can make the argument look good. We must publish BOTH kinds of results." -- Richard Feynman's essay on Cargo Cult Science 
1. Journal of Articles in Support of the Null Hypothesis
2. "Journal of Negative Results in Biomedicine "
3. "Journal of Negative Results - Ecology and Evolutionary Biology"
See also this review which critiques the few negative results which have been published in major journals . They usually don't include enough information to be useful!