ISPBill is an ISP billing and management system. It features automatic generation and emailing of invoices, receipts and statements, a customer interface, a ticket system, and much more. ISPBill is intended to continue where cwispy left off.
EkonomOS is a free, open source double-entry accounting software suitable for larger multiuser non-profit organizations. Using EkonomOS, the accounting can be done/browsed from anwyhere - even from Internet Cafe!
Open Source Indie band manger for working bands. Manage gigs/tour, inventory, income/expenses, e-mail lists, setlists, songs/tabs/audio, contacts, promotion and let it create/update your band website on the fly.