The journals listed below are either entirely free or with free back issues.
Impact factors > 7000
Development The EMBO Journal Genes and Development Journal of Biological Chemistry Molecular and Cellular Biology Molecular Biology of the Cell Others Applied and Environmental Microbiology Biophysical Journal Genetics Genetic Engineering News Genome Research Journal of Experimental Botany Microbiology and Molecular Biology Reviews Nucleic Acids Research Plant Physiology The Plant Cell Stem Cells
Others