Misc
Softphone 4 Spark
Plugin for the Spark Jabber client. If you have a VoIP client such as Skype or Avaya (corporate environment) installed, this plugin allows you to place a phone call to one of your IM contacts provided he has a phone number in this profile.
Copy the file to your Spark/plugins directory and restart Spark. Then go to Spark -> Preferences -> Softphone and ajust your settings.
System requirements: Java 6 or JDIC (comes with Spark on Windows) installed!
Download plugin JAR file or have a look at a screenshot.