Bench Accounting - Bookkeeping done for you
Snarl - Snarl is a notification system for Windows.
Synder - AR Automation
Growl for Windows - Growl for Windows is a Windows-compatible version of https://alternativeto.
InvoiceApp - Beautiful online invoicing software for small businesses
Notify OSD - Canonicals on-screen-display notification agent, implementing the freedesktop.