GnuCash is personal and small-business financial-accounting software, freely licensed under the GNU GPL and available for GNU/Linux, BSD, Solaris, Mac OS X and Microsoft Windows.
- - GnuCash is the most popular Windows, Mac & Linux alternative to SlickPie.
- - GnuCash is the most popular Open Source & free alternative to SlickPie.
Odoo (formerly OpenERP) is a suite of open-source business apps written in Python and distributed under the AGPL license, under the Open Core software business model. It is used by 2 million users worldwide to manage companies of all size.
- - Odoo is the most popular Web-based, Android, iPhone, iPad, Android Tablet & Self-Hosted alternative to SlickPie.
InvoicePlane is a self-hosted open source application for managing your quotes, invoices, clients and payments. The application comes with various options, templates and settings to customize your invoicing experience.
Paymo is a work management software for small businesses. It allows you to manage projects and business tasks, track work time, and invoice clients from one place.
Wave makes it easy to be your own boss. Just do what you're good at, and lean on Wave's smart online software for help with invoicing, accounting and payroll.
This is a continuation of Manta App, I'm taking care about the maintenance and new features as I need it.
This GitHub repository has been archived by the owner on July 3, 2023.
From invoicing to expense tracking to accounting, Akaunting has all the tools you need to manage your money online, for free.
BILLmanager is a highly customizable billing software for hosting and IaaS business with the full scope of functionality for billing, service provisioning, client management & support.
- - BILLmanager is the most popular commercial alternative to SlickPie.
Insightly is a web-based project and Customer Relationship Management (CRM) application that integrates with Google Apps via a Gmail contextual gadget and Google Docs support.
Send, track and collect payments quickly. Great for teams, freelancers and service providers. FreshBooks is an easy cloud accounting app for small businesses and freelancers, specifically designed to save you time billing clients.
Crater is an open-source app made in Laravel, VueJS & React Native that helps you track expenses, payments & create professional invoices & estimates.
Painless invoicing with stunning customizable templates.Discontinued
The project looks unmaintained, last update was in March 2018.