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Top 23 object-oriented-programming Open-Source Projects
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awesome-low-level-design
Learn Low Level Design (LLD) and prepare for interviews using free resources.
Awesome Low-Level Design
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InfluxDB
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scala
Scala 2 compiler and standard library. Scala 2 bugs at https://github.com/scala/bug; Scala 3 at https://github.com/scala/scala3
I’ve been a web developer for years, but I haven’t touched Java in a long time — like, late-90s long. Back then, Java development felt cumbersome: lots of boilerplate and complex configurations. It was not exactly a pleasant experience for building simple web apps. So when I recently started exploring Scala and the Play Framework, I was curious more than anything. Has the Java developer experience gotten better? Is it actually something I’d want to use today?
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low-level-design-primer
Dedicated Resources for the Low-Level System Design. Learn how to design and implement large-scale systems. Prep for the system design interview.
Project mention: 🔥 17 Best Free GitHub Repositories to Crack System Design Interviews 🛠️ | dev.to | 2024-12-067. Low Level Design Primer
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Project mention: SymbolicAI: A neuro-symbolic perspective on LLMs | news.ycombinator.com | 2025-06-27
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pharo
Pharo is a dynamic reflective pure object-oriented language supporting live programming inspired by Smalltalk.
Perhaps switch languages/paradigms for a few days. If you are used to using "text-based" languages such as golang, python, c++ or java, try something like Smalltalk to freshen you up. Pharo https://pharo.org/ is a nice implementation.
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Ultimate-Notes-Books-Resources-for-NCIT
Curated list of notes, books and other resources for the student of Nepal College of Information and Technology(NCIT) - Pokhara University, Nepal
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awesome-csharp
Awesome list of C# related libraries, tools and tutorials. Inspired by awesome-dotnet, awesome-dotnet-core, awesome-roslyn and awesome.
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stellogen
An experimental unification-based programming language with logic-agnostic types, based on Girard's transcendental syntax
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Super-Mario-Bros
Classic Super Mario Bros. game implemented with Java for CS319 course (by ahmetcandiroglu)
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Python
This repository contains the python source code, containing more than 40 python projects, involving many fields.仓库用于储存python源代码, 包含40多个python项目，涉及爬虫、算法、OpenGL、tkinter、面向对象编程等多个领域。 (by qfcy)
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JAVA-SE-Tutorial-codeswithpankaj
Pankaj-Str's GitHub, 'JAVA-SE-Tutorial-codeswithpankaj,' is a concise compendium of Java SE tutorials. Ideal for developers and learners, it offers clear and insightful code snippets, providing an efficient pathway to enhance Java programming skills. A valuable resource for mastering essential concepts
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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).
object-oriented-programming discussion
object-oriented-programming related posts
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Show HN: I made a new programming lang
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Show HN: Flux, a mid-level systems OOP language
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Show HN: New Programming Language
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SymbolicAI: A neuro-symbolic perspective on LLMs
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Ask HN: Running LLMs Locally
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How do I compile/build a Super Mario game that has no pom/build file?
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Show HN: SymbolicAI
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A note from our sponsor - Sevalla
sevalla.com | 1 Sep 2025
Index
What are some of the best open-source object-oriented-programming projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | awesome-low-level-design | 17,506 |
| 2 | scala | 14,403 |
| 3 | Modern-CPP-Programming | 13,705 |
| 4 | fprime | 10,450 |
| 5 | low-level-design-primer | 7,077 |
| 6 | symbolicai | 1,590 |
| 7 | pharo | 1,304 |
| 8 | eo | 1,257 |
| 9 | Ultimate-Notes-Books-Resources-for-NCIT | 292 |
| 10 | KotlinTutorial | 269 |
| 11 | kinx | 237 |
| 12 | awesome-csharp | 147 |
| 13 | stellogen | 112 |
| 14 | rpp | 93 |
| 15 | cs246e-notes | 79 |
| 16 | Super-Mario-Bros | 68 |
| 17 | Python | 56 |
| 18 | fuzion | 55 |
| 19 | ecal | 48 |
| 20 | JAVA-SE-Tutorial-codeswithpankaj | 40 |
| 21 | DML | 38 |
| 22 | oop-in-cpp | 36 |
| 23 | garter | 22 |
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