Internet - Instant Messengers (23)

Miranda NG is a multi-protocol instant messaging client supporting most common protocols by default including Facebook, IRC, Jabber XMPP, MinecraftDynmap, Omegle, Sametime, SkypeWeb, Steam, Tox, Twitter, and more. Additional protocols are also available, as well as plugins and languages via "Main menu > Available Components list" (see online list).

Note: The program started as a code fork of Miranda IM. Though the latter is no longer maintained, a FAQ about the original differences is available, alongside a migration guide.

Alternatively, Miranda NG Portable is also available.

Telegram is an easy-to-use, secure messaging and VoIP service. The program can be installed on multiple locations and devices, and will synchronize with all connected tools. It supports video calls, broadcast messages, huge chat rooms and can transfer any file type, up to 1.5 gigs each.

Note the program requires a working phone number in order to log in (via SMS or automated phone call).

Cross-platform with clients available for Mac, Linux, iOS, Android and as a web app. A PortableApps version is also available.

Pidgin Portable is a Pidgin version made by PortableApps.com. Pidgin is an easy-to-use multi-protocol instant messaging client with a tabbed interface, customizable sounds, themes and more. Supports a long list of networks including Jabber/XMPP, Gadu-Gadu, IRC, MicroFocus GroupWise Messenger, SILC, and more. It also includes support for many features such as file transfers, away messages, buddy icons, emoticons and typing notifications.

Plugins are also available to add more features including more networks, security, interface tweaks, and more. Themes are available via an additional download.

Pidgin is cross-platform with clients available for Mac OS and Linux; it supports 80+ world languages.

Other portable versions (note that these are oudated and may not function):

• Official Procedure to make the official client portable (fairly long)
• Script kindly contributed by rokth

BeeBEEP is a customizable chat and file/folder sharing tool for individuals or groups inside your local area network such as an office, home, or internet cafe. Conversations are peer-to-peer (no server required), encrypted, and messages sent to offline users will be delivered when they come online. Features include screen and file sharing, spellcheck, individual and group chats, and you can easily send quick voice recordings and screenshots. The program can also be configured to function as a file servers, sharing multiple files and folders for download by other clients.

Cross-platform with clients available for Linux, Mac and more.

qTox is an easy, secure instant messaging and VoIP client for the distributed Tox network. The program includes standard features like chat between users, group chats, file transfer with image preview, as well as high-quality audio and video calls with group call capability.

The program is peer-to-peer, meaning no central server is necessary for the network to function.

Cross-platform with clients available for Mac, Windows, FreeBSD and Android. Alternatively, qTox Portable is also available.

TeamSpeak is a VoIP tool focused on efficient system and bandwidth usage. Although targeting online gamers, the program includes collaboration tools including file transfer, easy permissions, secure connections and a customizable interface. Other premium audio functions include surround sound capability and positioning. The program can also function offline, meaning you don't need the Internet to connect with other users on your local network.

Cross platform with clients available for Mac, Linux, iOS and Android.

Brosix is a secure instant messaging and collaboration tool featuring voice, video, and text chat, whiteboard, and a private team network. Interface includes tabbed chat, chat history, spell check and anti-virus support.

Messages with other Brosix users are secured and can be sent when they are offline and delivered upon return. All communication with other Brosix users is encrypted and clients are available for Mac, Linux, iOS, Android, as well as via a Web Client to use the Brosix network with most browsers.

Note that the program requires creating a login using an email address and has been limited to only three users in the free tier.

TeamTalk is a feature-rich conferencing application aimed at providing everyone a VoIP solution regardless of connection speed. Includes video conferencing, desktop sharing, file sharing, audio streaming, recording and much more. Audio push-to-talk and audio detection are both available. Features include quality controls, packetloss resistance, de-noising of outgoing audio, 3D positioning of sound and much more.

Note: This program may or may not function with public servers, meaning it will require a running server to connect with other users.

Miranda IM is an extensible, customizable instant messenger client supporting Facebook, Gadu-Gadu, Jabber, ICQ, IRC, MSN, Yahoo and more. The program can support more protocols via an extended plugin system to include Netsend, IAX, Tlen etc. and an add-on system can add other features such as skins, an RSS feed reader, weather alert, world clock, secure messaging etc.

Note: it is no longer maintained, but its fork Miranda NG can be used instead.

Alternatively, Miranda IM Portable is another portable version.