A messages UI for iPhone and iPad.

Creating a "maximum complete" backup of data stored at Podio (including files).

Afloat is a Mac extender that adds useful window management commands to most Mac apps.

Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)

A Quartz Composer framework that enables interactive design prototyping without programming.

A virtual machine for executing programs written in Hack.

The library for web and native user interfaces.

Xamarin.iOS sample apps

Open-Source Messaging App

UMEKit - A port of UIKit for Mac OS X desktop

Chameleon is a port of Apple's UIKit for iOS (and some minimal related frameworks) to Mac OS X.