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Top 23 Library Open-Source Projects
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AppSignal
AppSignal knows why the f*#k it crashed. Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.
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Project mention: Dear ImGui: Bloat-free Graphical User interface for C++ | news.ycombinator.com | 2026-09-03
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ccxt
A unified trading API with more than 100 crypto exchanges and prediction markets in JavaScript / TypeScript / Python / C# / PHP / Go / Java / Rust
Project mention: My WebSocket was open the whole time. It just stopped sending anything. | dev.to | 2026-08-31#22662 — watch_order_book hangs indefinitely: socket open, pings and pongs succeeding, no data, no exception raised.
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libcurl
A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl offers a myriad of powerful features
Project mention: Two ARM64-specific compiler optimization bugs, in GCC 15/16 and Rust, hit curl | news.ycombinator.com | 2026-10-06The social post links to this bug https://github.com/curl/curl/issues/23237
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I have used HeroUI and Untitled UI, and I consider both good options. Both provide free components, but accessing their more complete collections of components, page examples, and application templates requires buying their paid versions. That can still be a sensible investment if it saves several days of design and development work.
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Mojs - Screen density independent effects look good on any device
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Framework7 is a hybrid mobile app framework focused on creating iOS and Android apps with a native look and feel. It is especially suitable for Progressive Web Apps (PWAs) and smaller projects. Framework7 comes with a comprehensive set of UI components that match each platform’s design guidelines, allowing developers to quickly build visually appealing applications with minimal configuration.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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Project mention: Show HN: Shirei, cross-platform GUI framework in native Go | news.ycombinator.com | 2026-07-12
Is Tracy complicated enough? Because it's imgui.
https://github.com/wolfpld/tracy
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webview
Tiny cross-platform webview library for C/C++. Uses WebKit (GTK/Cocoa) and Edge WebView2 (Windows).
Glaze is a desktop WebView binding for Go. It is a pure-Go port of webview/webview built on purego, keeping CGo out of the picture. Each backend talks to the WebView framework the OS already ships -- WKWebView on macOS, WebKitGTK on Linux, WebView2 on Windows -- so nothing native is bundled.
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QuestPDF
QuestPDF is a modern library for PDF document generation. Its fluent C# API lets you design complex layouts with clean, readable code. Create documents using a flexible, component-based approach.
Project mention: 7 Document Processing Tasks Every .NET Developer Should Automate | dev.to | 2026-05-20The following example uses QuestPDF to generate a simple invoice PDF:
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Project mention: Mastering Unattended Remote Desktop on Wayland: A Modern DevOps Guide | dev.to | 2026-08-19
This implementation utilizes RDP and includes a clever mechanism for session handoff. When a user authenticates, the system daemon manages a redirection process that ensures the user is securely passed from the login greeter to their specific desktop session. With the release of GNOME 50, this system has seen major performance improvements, including GPU-offloaded video encoding via Vulkan and VA-API, which makes the remote interaction significantly more responsive.
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The BLoC (Business Logic Component) pattern is where serious teams land. Google's own Flutter team uses it internally. Nubank, one of the world's largest digital banks with 90 million customers, built its app on it. BMW runs it in production. The flutter_bloc package has logged over 1.4 million downloads on pub.dev. That's not hype. That's validation at scale.
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animated-tab-bar
:octocat: RAMAnimatedTabBarController is a Swift UI module library for adding animation to iOS tabbar items and icons. iOS library made by @Ramotion
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$ curl -s "https://detectzestack.p.rapidapi.com/analyze?url=example.com" \ -H "X-RapidAPI-Key: YOUR_KEY" \ -H "X-RapidAPI-Host: detectzestack.p.rapidapi.com" { "url": "https://example.com", "domain": "example.com", "technologies": [ { "name": "cdnjs", "categories": ["CDN"], "confidence": 100, "description": "cdnjs is a free distributed JS library delivery service.", "website": "https://cdnjs.com", "icon": "cdnjs.svg", "source": "http", "version": "", "cpe": "" }, { "name": "jQuery", "categories": ["JavaScript libraries"], "confidence": 100, "description": "jQuery is a JavaScript library designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.", "website": "https://jquery.com", "icon": "jQuery.svg", "source": "http", "version": "3.6.0", "cpe": "" }, { "name": "Cloudflare", "categories": ["CDN"], "confidence": 100, "description": "Cloudflare is a web-infrastructure and website-security company that provides content-delivery-network services, DDoS mitigation, and ICANN-accredited domain registration services.", "website": "https://www.cloudflare.com", "icon": "CloudFlare.svg", "source": "http", "version": "", "cpe": "" } ], "categories": { "CDN": ["cdnjs", "Cloudflare"], "JavaScript libraries": ["jQuery"] }, "meta": { "status_code": 200, "tech_count": 3, "scan_depth": "full" }, "cached": false, "response_ms": 1842 }
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libgit2
A cross-platform, linkable library implementation of Git that you can use in your application.
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koin
Koin - a pragmatic lightweight dependency injection framework for Kotlin & Kotlin Multiplatform
Project mention: Part 5: Wire Everything with Koin - Ktor Native Worker Tutorial | dev.to | 2025-12-21Koin is a lightweight dependency injection framework for Kotlin that:
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Project mention: React Native ile Endüstriyel Barkod Okuma: Ters Renk Data Matrix Kodları ve Zebra DataWedge Entegrasyonu | dev.to | 2025-12-19
React Native Vision Camera
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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).
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You write one kind sentence. I donate a dime. A blockchain makes sure I do.
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A note from our sponsor - AppSignal
www.appsignal.com | 9 Oct 2026
Index
What are some of the best open-source Library projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | react | 250,916 |
| 2 | imgui | 76,476 |
| 3 | ccxt | 44,251 |
| 4 | libcurl | 43,036 |
| 5 | heroui | 30,895 |
| 6 | Mo.js | 18,796 |
| 7 | framework7 | 18,763 |
| 8 | tracy | 16,866 |
| 9 | badger | 15,779 |
| 10 | webview | 14,263 |
| 11 | QuestPDF | 14,194 |
| 12 | FreeRDP | 13,785 |
| 13 | barba | 12,978 |
| 14 | bloc | 12,482 |
| 15 | animated-tab-bar | 11,085 |
| 16 | Apache Thrift | 10,963 |
| 17 | cdnjs | 10,744 |
| 18 | FSCalendar | 10,648 |
| 19 | libgit2 | 10,617 |
| 20 | folding-cell | 10,184 |
| 21 | icecream | 10,111 |
| 22 | koin | 10,022 |
| 23 | react-native-vision-camera | 9,644 |
Sponsored
AppSignal knows why the f*#k it crashed.
Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.
www.appsignal.com