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Marcin Krzyzanowski

Disappointment Islands

My OpenSource work focuses on Swift and iOS/macOS development.
I created cryptography libraries used by many applications out there. To name CryptoSwift or ObjectivePGP

I'm interested in working with the Swift toolchain and proposing or building many dev tools that help to make our dev life easier. Online Swift Playgroud is a free tool to sketch Swift code online.

STTextView is the custom implementation of text view with TextKit. It's a repository of knowledge about TextKit 2 and building text components.

Other than that, I actively support Swift and iOS community by giving talks and presentations during conferences worldwide.

The best way to track what's in my place currently is to follow my Twitter account @krzyzanowskim or my blog



to the moon! you're awesome!

Current sponsors 15

Private Sponsor
Private Sponsor

Featured work

  1. krzyzanowskim/CryptoSwift

    CryptoSwift is a growing collection of standard and secure cryptographic algorithms implemented in Swift

    Swift 10,073
  2. krzyzanowskim/ObjectivePGP

    ObjectivePGP is an open-source library for iOS and macOS that provides developers with tools for implementing OpenPGP encryption and decryption, digital signing, and signature verification in their…

    Objective-C 661
  3. Swift 241
  4. krzyzanowskim/Natalie

    Natalie - Storyboard Code Generator (for Swift)

    Swift 1,171
  5. krzyzanowskim/OpenSSL

    OpenSSL package for SwiftPM, CocoaPod, and Carthage, multiplatform

  6. krzyzanowskim/STTextView

    Performant and reusable macOS text view component (TextKit2), with line numbers and more. NSTextView replacement.

    Swift 891

43% towards 30 monthly sponsors goal

@TimOliver @dooZdev
@bobek-balinek @bhaze31 @glaurent @dannyow @objcio

TimOliver and 12 others sponsor this goal

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$ a month

You'll receive any rewards listed in the $25 monthly tier. Additionally, a Public Sponsor achievement will be added to your profile.

$5 a month


Fan - Midnight coffee is on you!

$25 a month


Supporter - Maintaining the codebase that you use is a huge effort. This is how to secure you won't get left without support. you should mark your sponsorship status to get priority support treatment.

Sponsors can get a beautiful pin and stickers sent their way as a modest thank-you.

$100 a month


Sponsor — you fund a massive part of my work. As a major sponsor, I may feature your name/brand in project README.