Create BIOM-format tables (http://biom-format.org) from Kraken output (http://ccb.jhu.edu/software/kraken/, https://github.com/DerrickWood/kraken).
Create BIOM-format tables (http://biom-format.org) from CLARK output (http://clark.cs.ucr.edu/) for use with downstream tools such as UniFrac, iTol (itol.embl.de), or PhyloToAST (phylotoast.org), PhyloToAST (http://phylotoast.org).