Flowc is a tool for gathering, storing and analyzing traffic accounting for CISCO routers with NetFlow enabled switching (version 5). This package could be used by ISP for planning, analysis, billing procedures and networks troubleshooting. The author express gratitude to Egor Egorov, Sergey Korsak and Alexand Sudakov for valuable ideas and remarks, Alexander Vistorpsky for help in package development, Zeus V Panchenko, Sergey Nakonechny, Denis Burduk and Alexey Bokan for flowc testing, and Alena S.Zilova for logo.