Nice cocoapods

iOS

• MortimerGoro / MGSwipeTableCell An easy to use UITableViewCell subclass that allows to display swippable buttons with a variety of transitions.
• SwiftyJSON / SwiftyJSON The better way to deal with JSON data in Swift
• Cocoanetics / DTBonjour Framework for Communicating over Bonjour+Wifi
• Cocoanetics iOS developemnt utilities, a bit old
• jdg / MBProgressHUD MBProgressHUD + Customizations
• ViewDeck / ViewDeck An implementation of the sliding menu found in various iOS apps.
• uacaps / PageMenu A paging menu controller built from other view controllers placed inside a scroll view (like Spotify, Windows Phone, Instagram)
• rs / SDWebImage Asynchronous image downloader with cache support as a UIImageView category

Xcode

• Nomad World-Class Command Line Utilities For iOS Development
• fastlane Automated building and releasing of iOS and Android apps

Swift

• vapor / vapor A web framework and server for Swift that works on macOS and Ubuntu.

Ruby

• stympy / fakerA library for generating fake data such as names, addresses, and phone numbers.
• SergioFierens / ai4r Artificial Intelligence for Ruby - A Ruby playground for AI researchers
• sferik / rails_admin RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data
• omniauth / omniauth OmniAuth is a flexible authentication system utilizing Rack middleware.
• schacon / ruby-git Ruby/Git is a Ruby library that can be used to create, read and manipulate Git repositories by wrapping system calls to the git binary.