Send invoices from your web server with Rocket Invoice. Rocket Invoice installs in minutes, has no monthly fees and runs on your web server with 100% access to the source code. Familiar Technology PHP and MySQL are at the heart of Rocket Invoice. Web designers and developers will be able to customize their invoicing experience with ease. activeCollab Integration New feature! Rocket Invoice can be configured to connect to activeCollab to generate invoices from time entries. File Delivery to Clients Upload files to be delivered to your clients after they've paid an invoice. Useful for web designers, developers, graphic artists and online content distributors. Multi-Currency and Multi-Language Rocket Invoice supports invoicing clients in your currency and in your language. Credit Memos and Estimates Rocket Invoice supports many statement types—not only invoices.