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Full‑featured free accounting suite with unlimited invoices and a drag‑and‑drop template editor.
Open‑source invoicing platform offering a free tier with unlimited invoices and fully customizable HTML/CSS templates.
Free for up to 5 customers; includes a template designer that lets you modify colors, fonts, and layout.
Create and send invoices at no cost; basic template customization (logo, colors, terms) directly in the dashboard.
Free invoicing with a simple template editor; you can add branding, adjust payment terms, and set due dates.
#7 Invoicely
Free tier supports unlimited invoices and a template builder that lets you edit header/footer, colors, and fonts.
Free plan includes unlimited invoices and a visual template editor for branding and layout tweaks.
#9 Brightbook
UK‑based free invoicing app with a clean template editor; change logo, colors, and payment instructions.
#10 Simple Invoices
Open‑source PHP invoicing system; fully customizable invoice templates using HTML/CSS.
#11 Akaunting
Free, open‑source accounting software with an invoice module that lets you edit template layouts and branding.
#12 InvoicePlane
Self‑hosted open‑source invoicing solution; edit invoice templates via a built‑in editor or custom PHP/HTML.
#13 GnuCash
Desktop accounting program (free) with invoicing; templates can be customized through XML and style sheets.
Open‑source ERP with a free invoicing app; template customization via QWeb (XML) and CSS.
Free open‑source suite; invoicing module includes a template editor for logos, colors, and line‑item layout.
#16 ERPNext
Free open‑source ERP; powerful invoice designer lets you modify header, footer, fonts, and add custom fields.
Free for up to 5 users; includes unlimited invoices with a simple drag‑and‑drop template customizer.
Free tier offers 3 invoices per month and a template editor for logo, colors, and payment terms.
Free plan provides unlimited invoices with a visual template builder for branding and layout tweaks.
#20 Fakturama
Open‑source invoicing software; fully editable invoice templates using OpenDocument format.
#21 Billdu
Free invoicing app for small businesses; customizable templates with logo, colors, and custom fields.
Free for freelancers; includes a template editor to adjust branding, fonts, and payment instructions.
#23 SlickPie
Free online invoicing with a simple template editor for logo upload, color selection, and custom notes.
Time‑tracking + invoicing; free tier lets you generate invoices with a basic template customizer.
Freelancer‑focused invoicing; free tier includes a template editor for branding and payment terms.
Simple invoicing tool with unlimited invoices on the free plan; template customization includes logo and colors.
Mobile‑first invoicing app; free version lets you edit template layout, add logo, and set payment options.
Comprehensive accounting with a free tier; invoice designer supports custom branding, fonts, and conditional fields.
Free trial includes full template editor; after trial you can keep one client with unlimited invoices.
Free 30‑day trial with full invoice template customization; includes logo, colors, and custom fields.
30‑day free trial; offers a powerful template designer for branding, layout, and custom messages.
#32 OpenInvoice
Open‑source invoicing system; templates are pure HTML/CSS, giving total control over design.
#33 FreeInvoice
Lightweight web‑based invoicing tool; includes a simple template editor for logo, colors, and terms.
Self‑hosted version of Invoice Ninja (free) with unlimited invoices and full template customization via Blade templates.
Free online invoicing with a basic template editor; add logo, adjust colors, and include custom fields.