AIM - v7.5.8.2 - 7,85 MB - Freeware - Windows XP / Vista / 7

AIM helps you connect with the people you care about - anytime, anywhere. Now with support for Google Talk and Facebook Chat, there's no reason to lose touch.

Eudora - v7.1.0.9 - 16,2 MB - Freeware - Windows 2000 / XP

Eudora is a robust e-mail client whose features include multiple address-book-formatting options and the ability to filter, redirect, and forward mail. It supports QuickTime- and HTML-enriched e-mail, letting you include stylized, formatted text and in-line graphics in your messages. Other features include a multipane interface; background mail-checking and sending; the ability to import existing settings, e-mail, and address books from Microsoft Outlook, Outlook Express, or Netscape mail programs; a Qualcomm PureVoice plug-in that allows voice-message exchanges; and a customizable interface, including movable, dockable window groups and toolbars.

Google Talk - v1.0.0.104 beta - 1,53 MB - Freeware - Windows XP / Vista / 7

The Google Talk downloadable application for Windows offers many features for communicating with your friends and family. Chat with all of your Google Talk and Gmail contacts in real time. You can talk to anyone else for free who's online and has the Google Talk client. Send files to your contacts. There are no file size or bandwidth restrictions. When you're signed into Google Talk, you'll be notified of new messages in your Gmail inbox.

ICQ - v7.4 - 12,2 MB - Freeware - Windows XP / Vista / 7

New ICQ with a new messaging history tool, Facebook Chat connectivity and email notifications from Gmail, Yahoo! Mail and Mail.ru.

IncrediMail - v6.25 build 4824 - 11,2 MB - Freeware - Windows XP / Vista / 7

IncrediMail is a fun, powerful and user-friendly email program available to everyone free of charge. IncrediMail lets you add 1000s of backgrounds, emoticons, ecards, sounds, animations, and 3D effects to your emails. You also get fun animated characters to notify you of incoming email.IncrediMail is compatible with leading email services including Hotmail, Gmail, Yahoo, and AOL, and supports POP mail protocols as well as HTML mail formatting. Importing your active email accounts and messages with IncrediMail is quick and simple.

Miranda IM - v0.9.16 - 2,96 MB - Freeware - Windows 95 / 98 / NT / 2000 / XP / Vista / 7

Miranda IM is a multi-protocol instant messaging client for Windows. Very light on system resources and extremely fast, Miranda IM requires no installation and can be made to fit on a single floppy disk or USB drive. Featuring a powerful plugin-based framework and boasting over 350 plugins, Miranda IM is one of the most flexible and customisable messaging clients on the planet.

mIRC - v7.17 - 1,98 MB - Shareware - Windows 2000 / XP / Vista / 7

mIRC is a full featured Internet Relay Chat client for Windows that can be used to communicate, share, play or work with others on IRC networks around the world, either in multi-user group conferences or in one-to-one private discussions.

Pidgin - v2.7.10 - 9,15 MB - Open Source - Windows 2000 / XP / Vista / 7

Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.

Skype - v5.1.0.112 - 0,89 MB - Freeware - Windows XP / Vista / 7

Skype is software that enables you to make free calls anywhere in the world. Skype uses innovative P2P (peer-to-peer) technology to connect you with other users. It offers several features, including SkypeOut calling from Skype to regular and mobile phones worldwide, conference calling, and secure file transferring.

Thunderbird - v3.1.7 - 9,67 MB - Open Source - Windows 2000 / XP / Vista / 7

Mozilla's Thunderbird email application is more powerful than ever. It's now even easier to organize, secure and customize your mail. Thunderbird features many new enhancements to help you better manage your unruly inbox, and stay informed. Thunderbird scales to the most sophisticated organizational needs while making it easy to find what you need.

Trillian - v4.2.0.25 - 15,5 MB - Freeware - Windows 2000 / XP / server 2003 / Vista / 7

Trillian lets you connect to multiple IM and social networks at the same time, managing contacts and real time status feeds efficiently.

Windows Live Messenger - v15 - 1,22 MB - Freeware - Windows XP / Vista / 7

The best way to stay in touch with your friends Share photos and videos while you chat. Video chat in high definition or send a video message to a friend. And connect your social networks to see important updates in one place—Messenger.

XChat - v2.8.9 - 975 KB - Open Source - Windows 2000 / server 2003 / XP / Vista / 7

XChat is an IRC chat program for both Linux and Windows. It allows you to join multiple IRC channels (chat rooms) at the same time, talk publicly, private one-on-one conversations etc. Even file transfers are possible.

Xfire - v1.127 - 6,80 MB - Freeware - Windows 2000 / XP / Vista / 7

Xfire is a freeware instant messaging service targeted at gamers, that also serves as a game server browser and has various other features. It is currently available for Microsoft Windows. Xfire was originally developed by Ultimate Arena based in Menlo Park, California.

Yahoo! Messenger - v10.0.0.1270 - 408 KB - Freeware - Windows 98 / ME / NT / 2000 / XP / Vista / 7

Yahoo Messenger is a free service that allows you to see when friends come online and to send them instant messages. It also can alert you to new e-mail in your Yahoo Mail or Yahoo Personals accounts, or when you have upcoming events recorded in your Yahoo Calendar.