ExPASy <http://www.expasy.org/tools/>

ExPASy, tools for protein identification, characterization and DNA sequence analysis.

Molecular Databases on NCBI <http://www.ncbi.nlm.nih.gov/Database/index.html>

A list of molecular databases from NCBI including; Nucleotide Databases, Protein Databases, Structure Databases, Taxonomy Databases, Genome Databases and Expression Databases.