IM+ supports simultaneously major IM services, including Google Talk, Twitter DMs, Yahoo!, AIM/iChat, ICQ, Jabber (and Slack through Jabber), etc.

PicMonkey is an online photo editing service.

Social Frame is a digital photo frame app that automatically updates new photos from Facebook & Twitter.

ProxToMe provides proximity-based authentication for the Internet of Things.

CloudBuckit is a desktop application that connects all of your cloud storages and FTP servers in one place.

Talkatone is a free calling app.

Tinfoil for Facebook is an alternative Facebook client that's basically a 'wrapper' for the official page, letting you access Facebook.