WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS.
Software bundle from Microsoft containing Mail, Messenger, Movie Maker, Photo Gallery, Writer, Toolbar and Family Safety
Free calls, text and picture sharing with anyone, anywhere!
Mobogenie is a personal manager for your Android phone. Transfer all the apps, contacts, SMS, music and other data between PC, phone, and the cloud.
Software bundle from Microsoft containing Mail, Messenger, Movie Maker, Photo Gallery, Writer, Toolbar and Family Safety.
Mobile messenger app with free voice & video call over 3G/4G & Wi-Fi.
Add cool live effects and funny graphics such as sunglasses or hats to a webcam's output
Free calls to regular phones (+ mobile in US) over the internet
Call or send instant messages. Google Talk has been replaced by Google Hangouts as an add-on for the Chrome browser, but it's still available here for download.
Video chat rooms & live webcams
Store and sync your email, calendar, contacts, files and documents in the cloud - yet have them locally accessible and aggregate information across accounts like Yahoo! Mail, Gmail, Hotmail and social networks like Facebook and Twitter
Lightweight, customizable mail client
Call anywhere in the US and Canada for free and get low rates for other countries with this small plugin, right from within Gmail
Dashboard for management of your Twitter accounts
Excellent e-mail client by Mozilla
Email client, calender, contact manager & instant messaging application
Extensible instant messaging client for AIM, Facebook Chat, Google Talk, Twitter, ICQ, MSN, and Yahoo