ERPNext

Akaunting's source-available core manages invoices, income and expenses in the browser. License limits apply to production use.

Aureus ERP combines finance, inventory, human resources, customer relationships, and projects through modular apps.

Bigcapital combines financial accounting, payment reconciliation and reports for small and medium-sized businesses.

Dolibarr combines customer management, quotes, invoices, accounting, and inventory. Modules add management of subscriptions and contracts.

LedgerSMB manages receivables, payables, and invoices and creates reports for financial accounting.

metasfresh brings together purchasing, sales, warehousing, logistics, production, and finance for companies in trade and manufacturing.

Cal.diy provides self-hostable appointment booking with availability settings, calendar connections, and booking management.

Easy!Appointments organizes online appointment booking for customers and teams on your own server.

Rallly collects scheduling polls to find a common time for meetings and events.

Nextcloud stores and shares files and syncs them across devices. Teams access them through the browser, desktop, and mobile devices.

Odoo Community brings together sales, purchasing, inventory, invoicing, calendar, and time tracking in a modular business suite.

SOGo combines calendars, contacts and webmail to help teams organize appointments and communication.

XWiki manages company knowledge and public wiki pages with a visual editor, search, versioning, and access rights. An optional paid app adds team calendars.

Dolibarr combines customer management, quotes, invoices, accounting, and inventory. Modules add management of subscriptions and contracts.

Aureus ERP combines finance, inventory, human resources, customer relationships, and projects through modular apps.

Dolibarr combines customer management, quotes, invoices, accounting, and inventory. Modules add management of subscriptions and contracts.

EspoCRM brings together contacts, companies, and sales opportunities for central management of customer relationships.

Odoo Community brings together sales, purchasing, inventory, invoicing, calendar, and time tracking in a modular business suite.

SuiteCRM brings sales, marketing and service work together in a shared CRM platform.

Twenty manages customer relationships and adapts to a company's workflows and customer processes.

Aureus ERP combines finance, inventory, human resources, customer relationships, and projects through modular apps.

Dolibarr combines customer management, quotes, invoices, accounting, and inventory. Modules add management of subscriptions and contracts.

LedgerSMB manages receivables, payables, and invoices and creates reports for financial accounting.

Odoo Community brings together sales, purchasing, inventory, invoicing, calendar, and time tracking in a modular business suite.

metasfresh brings together purchasing, sales, warehousing, logistics, production, and finance for companies in trade and manufacturing.

Akaunting's source-available core manages invoices, income and expenses in the browser. License limits apply to production use.

Aureus ERP combines finance, inventory, human resources, customer relationships, and projects through modular apps.

Crater creates quotes and invoices and manages payments and customer data on your own server.

Dolibarr combines customer management, quotes, invoices, accounting, and inventory. Modules add management of subscriptions and contracts.

Invoice Ninja combines quotes and invoices with payment management. You can self-host it or use the hosted service.

InvoicePlane brings together quotes, invoices, customer data and payments in a self-hostable web app.

InvoiceShelf is a self-hostable web app for quotes, invoices, payments, and expenses. The open-source software is built on PHP and Vue.js.

LedgerSMB manages receivables, payables, and invoices and creates reports for financial accounting.

Midday combines time tracking, invoices, and a financial overview for solo business owners and freelancers.

Odoo Community brings together sales, purchasing, inventory, invoicing, calendar, and time tracking in a modular business suite.

SolidInvoice creates quotes and invoices and supports online payments for freelancers and small businesses.

metasfresh brings together purchasing, sales, warehousing, logistics, production, and finance for companies in trade and manufacturing.

Leantime connects project goals with tasks, milestones, and time tracking. Teams plan their work on Kanban boards, among other views.

Midday combines time tracking, invoices, and a financial overview for solo business owners and freelancers.

Odoo Community brings together sales, purchasing, inventory, invoicing, calendar, and time tracking in a modular business suite.

OpenProject combines task management, Gantt planning, and time tracking. Teams coordinate projects and document their collaboration.

OrangeHRM Starter manages employee data, leave, working time, job applications, and performance reviews in a self-hostable web application.

TimeTagger records working time on an interactive timeline and organizes it with tags. You can self-host it or use it as SaaS.

Traggo records working time with custom tags and analyzes it in customizable dashboards. The web app runs on your own server.