Top 13 Alternative OpenSource for TEMPLATE in 2025

OpenSaas

OpenSaas

Frontend

The free SaaS template with superpowers

89.5K

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t3stack

t3stack

Frontend

The best way to start a full-stack, typesafe Next.js app

89.1K

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tinacms

tinacms

Content marketing

A fully open-source headless CMS that supports Markdown and Visual Editing

69.0K

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Zettlr

Zettlr

Productivity

Your One-Stop Publication Workbench

54.8K

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docmost

docmost

Community builders

Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion.

15.4K

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Next-js-Boilerplate

Next-js-Boilerplate

Development & IT

🚀🎉📚 Boilerplate and Starter for Next.js 14+ with App Router and Page Router support, Tailwind CSS 3.4 and TypeScript

12.9K

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vrite

vrite

Content marketing

Open-source developer content platform

3.6K

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excalidraw

excalidraw

Productivity

Virtual whiteboard for sketching hand-drawn like diagrams

seafile

seafile

Cloud services & hosting

High performance file syncing and sharing, with also Markdown WYSIWYG editing, Wiki, file label and other knowledge management features.

krita

krita

Visual design

Krita is a free and open source cross-platform application that offers an end-to-end solution for creating digital art files from scratch built on the KDE and Qt frameworks.

mermaid

mermaid

Development tools

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

primitives

primitives

Development & IT

Radix Primitives is an open-source UI component library for building high-quality, accessible design systems and web apps. Maintained by @workos.

trilium

trilium

Build it yourself

Build your personal knowledge base with Trilium Notes