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PolyMC

A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once.

  • Completely free
  • Windows, macOS and Linux
  • Open source
  • No account
  • Old edition (2011)
  • Paid game required

Old edition: the latest known version (7.1) dates from 11 November 2011. It is no longer recommended as current software; the package date does not mean the software is still maintained.

Overview

PolyMC is a game launcher, available on Windows, macOS and Linux.

Old edition: the latest known version (7.1) dates from 2011; it is no longer presented as current software.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once” — Flathub, 10 November 2026

At a glance

All of PolyMC is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Paid game required: this software is free, but the game it launches must be bought separately.

Strengths

  • Open source code
  • No account needed
  • Commercial use allowed

About

PolyMC is a custom launcher for Minecraft that focuses on predictability, long term stability, and simplicity. Features: Easily install game modifications, such as Fabric, Forge, and Quilt Control your Java settings Manage worlds and resource packs from the launcher See logs and other details easily Kill Minecraft in case of a crash/freeze Isolate Minecraft instances to keep everything clean Install and update mods directly from the launcher

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Facts collected from LicitPro automatic classification () —
  • Facts collected from Winget (Windows Package Manager) (credit card, account, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Automatic reading of the official pages (limits) —
  • Facts collected from Wikidata (licence, platforms) —
  • Last technical check: 5 November 2026
  • Description from Flathub — AppStream (Flathub)

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