| deepBase | Homo sapiens, Mus musculus, Gallus gallus, Ciona intestinalis, Drosophila melanogaster, Caenorhabditis elegans. | http://deepbase.sysu.edu.cn/ |
| miRBase | Homo sapiens, Rattus norvegicus, Canis familiaris, Mus musculus, Danio rerio, Takifugu rubripes and 151 others. | http://www.mirbase.org/ |
| piRNABank | Homo sapiens, Rattus norvegicus, Mus musculus, Danio rerio, Drosophila melanogaster, Ornithorhynchus anatinus. | http://pirnabank.ibab.ac.in/ |
| starBase | Homo sapiens, Mus musculus, Caenorhabditis elegans, Arabidopsis Thaliana, Oryza sativa, Vitis vinifera. | http://starbase.sysu.edu.cn/ |
| UCNEbase | Unspecified. | http://ccg.vital-it.ch/UCNEbas... |
| YM500 | Homo sapiens, Mus musculus. | http://ngs.ym.edu.tw/ym500/ |
