NAppGUI
NAppGUI: A native-backend desktop SDK for teams building shared-code applications in C. Ranked #43 of 61 in Desktop App Development Frameworks by our editors (5.0/10); pricing: Free plan; best for C developers building shared-code desktop applications.
At a glance
- Editor score5.0 / 10
- PricingFree plan
- Best forC developers building shared-code desktop applications
- Free planYes
- Paid fromFree
- UI stackNative
- Founded2015
- Facts checked23 Oct 2026
Where it wins
- Shares a C codebase across Windows, macOS, and Linux
- Uses native OS backends for GUI controls
- Offers runtime layouts, drawing, and OS services in one SDK
Where it doesn't
- Requires development in C rather than a higher-level language
- Interfaces are described in code, not a visual designer
- Technical support is directed to community channels
Our verdict on NAppGUI
NAppGUI is an open-source SDK for building desktop applications in C across Windows, macOS, and Linux. It suits developers who want one shared codebase while using each operating system’s native interfaces for GUI controls. Interfaces are described in code, with runtime layouts calculating control positions and sizes. That makes NAppGUI a fit for C developers comfortable defining application interfaces programmatically, rather than teams seeking a visual design-first workflow.
Its scope goes beyond controls: the SDK includes 2D drawing, images, fonts, text translation, Unicode support, and operating-system services for files, processes, threads, and memory. CMake-based builds support static or dynamic linking, while application resources can be embedded or packaged separately. This range is useful for projects that need shared application logic and platform-native GUI backends without assembling those capabilities from separate tools. NAppGUI’s listed desktop targets are Windows, macOS, and Linux.
NAppGUI is released under the MIT license and has a free, open-source model. The vendor directs technical questions to GitHub discussions and bug reports to its issue tracker, so teams should be comfortable relying on documentation and community channels. Choose it when C and native desktop development are central requirements and a code-defined interface suits the team. Consider another framework if the project calls for a visual UI builder, a higher-level primary language, or support arrangements beyond those community channels.
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NAppGUI pricing
NAppGUI fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Supported desktop OS | Multi_platform |
| UI stack | Native |
| Primary language | C (ANSI C90) |
| Open source | Yes |
| Mobile targets | Yes |
| App packaging | Both |
| Commercial support | Not verified |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | nappgui.com |
| Facts checked | 23 Oct 2026 |
Alternatives to NAppGUI
- FlutterAn open-source Dart framework for building cross-platform apps from shared UI code.9.3
- ElectronAn open-source framework for building desktop apps from a shared JavaScript codebase.9.1
- .NET MAUI.NET MAUI shares C# and XAML development across native mobile and desktop apps.9.0
See all NAppGUI alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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