Top 11 Swift Extension Projects
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SwifterSwift
A handy collection of more than 500 native Swift extensions to boost your productivity.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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PreviewMarkdown
QuickLook Markdown preview and icon thumbnailing app extensions for macOS Catalina and beyond
Project mention: Apple Notes Expected to Gain Markdown Support in iOS 26 | news.ycombinator.com | 2025-06-04Part of the point of Markdown is that it's supposed to read like plain text - many of the elements is what was commonplace on usenet and in email.
If you're on macOS though, the best option for rendered Markdown is a quicklook plugin. There are a few around - I like [1] though.
[1]: https://github.com/smittytone/PreviewMarkdown
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VCore
VCore is a Swift collection containing objects, functions, and extensions that I use in my projects
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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AEExtensionKit
AEExtensionKit is a dynamic library which is shared between AuroraEditor and extensions. It allows them to understand one another.
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STDevRxExt
STDevRxExt contains some extension functions for RxSwift and RxCocoa which makes our live easy.
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Casimir
Complex extension suite for Multiplatform Stack (SwiftUI, Combine, SPM, Async/Await) (by przemek-jablonski)
Swift Extensions discussion
Swift Extensions related posts
Index
What are some of the best open-source Extension projects in Swift? This list will help you:
# | Project | Stars |
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1 | SwifterSwift | 14,576 |
2 | VersaPlayer | 806 |
3 | SwiftyUtils | 560 |
4 | SwiftBoost | 211 |
5 | ExtensionKit | 134 |
6 | PreviewMarkdown | 54 |
7 | VCore | 53 |
8 | AEExtensionKit | 8 |
9 | STDevRxExt | 7 |
10 | CCNextField | 3 |
11 | Casimir | 1 |