November 2010 Update: I have moved on since early 2009, patches are welcome but I'm not actively developing this. Best Regards, Fahrzin Hemmati.

GTalk Invisible v.95 [zip] [tar.gz]

This plugin enables the long-awaited Invisible status for Google Talk users (works for Finch, Adium-X, and other implementations of libpurple as well). According to the ticket, this will never be implemented in the source code itself.

The source C-file is included in the above zip-file. If you don't know how to use it, the CHowTo page is a great place to start. Feel free to add the GList calls to add multiple account support.

Windows

To install, download and extract the zip file. Move the .dll file (or the one with gears in the icon if you can't see extensions) to "C:\Program Files\Pidgin\plugins\". Restart Pidgin and enable it (Tools->Plugins).

Linux

To install, download and extract the tar.gz file. Move the gtalkinvisible.so file to ~/.purple/plugins and restart Pidgin.

Linux 64-bit

To install, download and extract the tar.gz file. Move the gtalkinvisible_64.so file to ~/.purple/plugins and restart Pidgin. Make sure you're running a 64-bit OS and 64-bit Pidgin or use the 32-bit version.

Known Bugs:

• Doesn't work on start up -- Fixed by Khushman
• Supports only 1 XMPP/Jabber account -- Fixed by Siorarina. Supports multiple accounts
• Compiled for 2.5.1 or above (same version as Palm WebOS's libpurple)
• 64-bit version is compiled for 2.10.0 or above

Changelog:

• v.951 December 3, 2011:
  • Missing a line (thanks Khushman).
• v.95 November 27, 2011:
  • Fixed startup issue (thanks Khushman).
  • New 64-bit version added, compiled against 2.10.0 (thanks Khushman)
• v.923 August 14, 2010:
  • Fixed another segfault on startup (thanks Nilesh).
• v.922 December 28, 2009:
  • Fixed a segfault (thanks Jason Croft).
• v.92 December 25, 2009:
  • Support for multiple Jabber accounts enabled
  • Workaround for deprecated functions enabled
  • Code cleanup
• v.91 October 8, 2009 (Patch from Siorarina received):
  • Added support for multiple Jabber accounts
  • Workaround for deprecated functions
• v.90 Feb 17, 2009:
  • Original release

There is a blog post where you can submit bugs and comment. I hope this plugin helps!