Psi/2: JID'em All!

Psi is a capable Jabber client aimed at experienced users. Its design goals are simplicity and stability. Psi is highly portable and runs on Windows, OS/2, Unix/X11, and MacOS X.

The interface is very ICQ-like. Alerts appear in the contact list when events are received, and things like subscriptions requests appear as "system messages" (ICQ users know these well). Even "Chats" are queued in the contact list. Also, chats are "remembered" by default, so that you don't have to keep a bunch of windows open for each person. Just close the chat window. If you open it again it will all be there.

Psi is minimal but powerful. There are keybindings for just about everything, Unicode is supported throughout, and contacts are cached offline. Security is also a major consideration, and Psi provides it for both client-to-server (SSL) and client-to-client (GnuPG).

This program is licensed under the GNU General Public License. See the COPYING file inlcuded in this package for more information.

You can find more information about Psi on the official Psi home page at

What is Psi/2

Psi/2 is a separate development branch of Psi initially created to work on a version of Psi for OS/2 and eComStation operating systems. Why a separate branch? In early 2006, original Psi authors decided to discontinue the support of the Qt Toolkit Version 3 and ported Psi sources to Qt Version 4. Psi 0.10 was the last release based on Qt Version 3. However, Qt Version 4 was not available for the OS/2 platform back then, therefore the sources of Psi 0.10 have been taken and ported to OS/2.

Even we have Qt Version 4 now, we can't port the newest Psi, as they still use some Qt3 classes within Qt4. And we decided not to port them. So as soon as Psi changes this we reconsider a new port.

In the process of porting, several minor Psi bugs were fixed and some few bits of new functionality were added. These changes are unlikely to be applied to the current official Psi sources because of the differences in Qt Toolkits and because original authors are not interested in supporting the Qt 3 branch.

There are some more improvements planned to the Psi/2 branch. This branch will exist until at least Qt Version 4 for OS/2 becomes available. Please note that Psi/2 is NOT supported by original Psi developers, so don't send them bug reports and feature requests. See below for information about reporting bugs.

In order to clearly distinguish the original Psi application from Psi/2, the latter is used as the application name for the Psi/2 branch (including the 'Jabber client name and version' string reported to Jabber servers). In situations where using the slash character makes problems or even impossible (such as file names of distribution archives), 'psios2' is used instead.

Currently, binary Psi/2 packages are distributed only for OS/2 and eComStation (a Windows package based on Qt 3 is planned soon). If you need a version of Psi for a different platform, please visit the official Psi home hage mentioned above. There you will find the most recent version of Psi based on the Qt Toolkit Version 4.

This resource is the home page of the Psi/2 project.

Latest Version

The latest version of Psi/2 for OS/2 and eComStation is 0.10.1 released on 26-Sep-2006.

The major improvements in this release include:

  • Support for SSL connections (e.g.
  • Built-in support fo Innotek Font Engine (anti-aliased fonts)
  • Important bug fixes (such as system timer resource leak)

See Changes.txt for a full list of changes.

Please note that the application name has been changed to Psi/2 to clearly distinguish from the original Psi releases produced by the team. See Readme.txt for more info.


linksizedescriptionadditional requirements
psios2-0_10_1-os2.exe6021 KBFull installer[none, already includes LIBC 0.6.1 runtime]
psios2-0_10_1-os2.wpi4756 KBWPI archiveLIBC 0.6.1 Runtime WPI, WarpIn installer
psios2-0_10_1-os2.zip4825 KBZIP archiveLIBC 0.6.1 Runtime ZIP

If you are not sure what download link to use, please use the first one since it contains all you need.

Last modified 10 years ago Last modified on Nov 23, 2010, 9:31:40 AM