Software and Tools for SaaS & Tech Startups

PO

PostgreSQL

4.8/5.01 verified review

Free

The world's most advanced open source relational database system.

• Continuous active development spanning over 35 years with proven enterprise stability.
• Extensive support for complex data types, JSON storage, and custom extensions.
• Completely free open source model with no commercial licensing restrictions.

VS

Visual Studio Code

4.7/5.01 verified review

Free·Open Source·MIT

Free and extensible source code editor with native support for AI-assisted workflows and remote development.

• Massive ecosystem of extensions for multiple languages and frameworks.
• Built-in support for remote development via SSH, containers, and WSL.
• Completely free distribution model with an open-source core.

194.4kstars on GitHub

DE

Deno

4.7/5.01 verified review

Free·Open Source·MIT

Secure JavaScript and TypeScript runtime with built-in tooling and Node.js compatibility.

• Native TypeScript support without external build configurations.
• Comprehensive built-in tooling including test runners and linters.
• Strong compatibility with npm packages and existing Node ecosystems.

108.8kstars on GitHub

BI

Bitwarden

4.7/5.01 verified review

Freemium

Trusted open source password manager with end-to-end encryption for teams and enterprises

• Verifiable open source architecture with end-to-end AES-256 encryption.
• Full self-hosting capabilities via Docker containers for total data control.
• Native support for passkeys and corporate secrets management.

GE

GenesisDB

4.7/5.01 verified review

Free·Open Source·MIT

Open source event sourcing database written in Go

• Distributed as a single static Go binary with zero runtime dependencies
• Native CloudEvents 1.0 support with hierarchical subject routing
• Completely open source under the MIT license with no event limits or license keys

14stars on GitHub

OP

OpenStarterKit

4.7/5.01 verified review

Free·Open Source·MIT

Open-source Next.js SaaS starter kit featuring Better Auth, Stripe, and Prisma.

• Completely free and open source with no licensing fees for initial development
• Built on plain Next.js without proprietary compilers or custom framework layers
• Includes pre-configured integrations for authentication, database ORM, and billing

22stars on GitHub

ML

MLflow

4.7/5.01 verified review

Free·Open Source·Apache-2.0

Open source AI engineering platform for agents, LLMs, and machine learning models.

• Open source platform with over 30 million monthly downloads and widespread industry adoption.
• Native OpenTelemetry support and compatibility with any LLM provider or agent framework.
• Integrated capabilities for systematic evaluation using LLM judges and prompt management.

28.6kstars on GitHub

AA

Apache Airflow

4.7/5.01 verified review

Free

Open-source platform to programmatically author, schedule, and monitor complex data workflows.

• Pipeline definition using pure Python code without complex XML files.
• Highly scalable modular architecture supporting multiple executors.
• Comprehensive web interface to inspect logs, retry tasks, and monitor states.

176stars on GitHub

IN

Infisical

4.7/5.01 verified review

Freemium

Modern identity security platform for developers, machines, and AI agents.

• Open-source and transparent alternative to HashiCorp Vault.
• Full self-hosting capabilities for private infrastructure.
• Comprehensive ecosystem including CLI, SDKs, and Kubernetes operator.

30.2kstars on GitHub

GE

Godot Engine

4.7/5.01 verified review

Free·Open Source·MIT

Free and open-source 2D and 3D game engine for cross-platform development.

• 100 percent royalty-free licensing model under the MIT license.
• Modular node-based architecture that facilitates component reuse.
• Native support for cross-platform development across desktop, mobile, and XR environments.

119.3kstars on GitHub

BL

Blender

4.7/5.01 verified review

Free

Open source 3D creation suite for modeling, animation, rendering, and compositing.

• Completely free and open source software with no licensing costs.
• Complete pipeline covering modeling, animation, rigging, simulation, and rendering.
• Extensible via Python scripts and community add-ons.

ZE

Zed

4.7/5.01 verified review

Free

A high-performance, multiplayer code editor built in Rust with GPU acceleration.

• Exceptional execution speed and low latency powered by Rust and GPU rendering.
• Built-in multiplayer collaboration for engineering teamwork.
• Native cross-platform support across macOS, Linux, and Windows.

92.3kstars on GitHub