Serves as a comprehensive resource center for mammalian imprinted ncRNAs. ncRNAimprint is a catalog of imprinted ncRNAs, including snoRNAs, microRNAs, piRNAs, siRNAs, antisense ncRNAs, and mRNA-like ncRNAs, which was annotated in detail using information extracted from relevant literature and databases. Comprehensive collections of imprinted ncRNA-related diseases, imprinting control regions (ICRs), and imprinted regions were manually compiled to provide resources for current research focusing on imprinted ncRNAs. Small RNA deep sequencing reads that fully matched within imprinted regions were also included to offer useful evidence in detecting novel imprinted ncRNAs and to aid in analyzing expression patterns of known imprinted ncRNAs. A search page including four effective search forms and two graphical browsers was created for rapid retrieval and visualization of these data.