seqparse
Parse sequence files (GenBank, FASTA, SnapGene, SBOL) and accession IDs (NCBI, iGEM) to a common format
ntseq
Nucleotide sequence manipulation and analysis library
aminosee
A unique visualisation of any large chunk of DNA or RNA residing in ASCII text files (such as FASTA, GBK etc and also just .txt like my hand-made test files), AminoSee is a way to render huge genomics files into a left-to-right top-bottom PNG linear image