How to: Authentication
*Oauth and Oauth2 libraries, social logins and captcha tools.*

- [Heimdallr.swift](https://github.com/trivago/Heimdallr.swift) - Easy to use OAuth 2 library for iOS, written in Swift.
- [InstagramSimpleOAuth](https://github.com/rbaumbach/InstagramSimpleOAuth) - A quick and simple way to authenticate an Instagram user in your iPhone or iPad app.
- [LinkedInSignIn](https://github.com/serhii-londar/LinkedInSignIn) - Simple view controller to login and retrieve access token from LinkedIn.
- [OAuth2](https://github.com/p2/OAuth2) - OAuth2 framework for macOS and iOS, written in Swift.
- [OAuthSwift](https://github.com/OAuthSwift/OAuthSwift) - Swift based OAuth library for iOS
- [ReCaptcha](https://github.com/fjcaetano/ReCaptcha) - (In)visible ReCaptcha for iOS.
- [SwiftyOAuth](https://github.com/delba/SwiftyOAuth) - A simple OAuth library for iOS with a built-in set of providers.

**[back to top](#contributing-and-collaborating)**