Sequence databases in FASTA format for use with the stand-alone BLAST programs. These databases must be formatted using formatdb before they can be used with BLAST.

NIH Genetic sequence database, an annotated collection of all publicly available DNA sequences.

Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.

GEO is a public functional genomics data repository supporting MIAME-compliant data submissions. There are also tools provided to help users query and download experiments and curated gene expression profiles.

Genetic Relationship and Fingerprinting (GRAF) is a rapid statistical method to detect duplicates and closely related samples in large genomic datasets to be used as a quality assurance tool in dbGaP data processing. For more information, see this abstract in PubMed.
https://www.ncbi.nlm.nih.gov/pubmed/28609482

A free, centralized voluntary registry of comprehensive genetic test information covering clinical and research tests for Mendelian disorders and drug responses including multigenic, array-based, biochemical, cytogenetic, and molecular tests.

This resource organizes NCBI information, resources, data, and tools and utilities on genomes including sequences, maps, chromosomes, assemblies, and annotations. Sequence and map data from the whole genomes of organisms. The genomes represent both completely sequenced organisms and those for which sequencing is in progress.

A database providing information on the structure of assembled genomes, assembly names and other meta-data, statistical reports, and links to genomic sequence data.

Genomes FTP site FAQ at https://www.ncbi.nlm.nih.gov/genome/doc/ftpfaq/

An integrated application for viewing and analyzing sequence data. With Genome Workbench, you can view data in publically available sequence databases at NCBI, and mix these data with your own data.

The protein sequences corresponding to the translations of coding sequences (CDS) in GenBank collected for each GenBank release.