Top 6 Erlang HacktoberFest Projects
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Project mention: Getting Started with AtomVM: Setup with Prebuilt Firmware (ESP32-S3, September 2025) | dev.to | 2025-09-01
I previously tried using AtomVM, a lightweight virtual machine that lets you run Elixir (and Erlang) applications directly on microcontrollers like the ESP32-S3, but honestly, I rushed through the process without fully understanding the underlying details — especially around firmware setup.
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SaaSHub
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MongooseIM
MongooseIM is Erlang Solutions' robust, scalable and efficient XMPP server, aimed at large installations. Specifically designed for enterprise purposes, it is fault-tolerant and can utilise the resources of multiple clustered machines.
Project mention: Mongoose IM 6.7.0 – Erlang Solutions robust, scalable and efficient XMPP server | news.ycombinator.com | 2026-05-15 -
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
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Index
What are some of the best open-source HacktoberFest projects in Erlang? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | AtomVM | 2,199 |
| 2 | Rebar3 | 1,816 |
| 3 | MongooseIM | 1,748 |
| 4 | worker_pool | 292 |
| 5 | elvis_core | 77 |
| 6 | rebar3_hank | 68 |
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