Recurring Invoices
Recurring Invoices provides a way for you to generate new invoices on a schedule.
Time Tracking for Projects
This add-on brings the Time Tracking features found in the paid versions of Sprout Invoices to the free version.
Payment Express – Credit Card Payments
Accept Invoice credit card payments via Payment Express Merchant Hosted solution.
beanstream – Credit Card Payments
Use beanstream as your credit card processor.
Authorize.Net – Credit Card Payments
Use the Authorize.net service as the credit card processor for invoice payments.
NMI – Credit Card Payments
Use NMI as your credit card payment processor.
BluePay Payments
Use BluePay for credit card processing your invoice payments.
Advanced Line Item Editor
Adds advanced editing to your line-items.
Canadian Invoicing Requirements and Customizations
Adds GST and HST tax to line items. Could be adopted to modify different types of taxes.
Advanced Form Integrations: Ninja Forms, Gravity Forms, Formidable, & WP Forms
Use your premium plugin based form to accept estimate requests that integrate with Sprout Invoices.
Caldera Forms
Caldera Forms integration is the most advanced form integration available. All for free.