GNU Bourne Again SHell - Bash is the shell, or command language interpreter, that will appear in the GNU operating system.
Free Invoice Generator - A free invoice generator for startups
fish shell - The friendly interactive shell.
Free-Invoice.co.za - Free Invoice Software | Free online tool that helps small businesses to generate free invoices and manage their contact list. It can be used as an alternative to expensive invoicing software and online invoicing applications
PowerShell Studio - PowerShell Studio is the easiest GUI designer and script generator available.
Invoice Template - Create beautiful looking invoices in seconds