The best replacement for pidgin is digsby.

The best alternatives to pidgin are rated as following:
★★★★★  digsby
★★★★  trillian
★★★  creole
★★  empathy
★★  adium
★★  windows messenger
★★  miranda
★  siri
★  kopete
★  spark
★  gaim
★  aim
  instantbird
  jitsi
  xchat
  amsn
  jabber
  psi
  yahoo messenger
  meebo
  creole languages

Your alternative for pidgin is not listed? Suggest!
Speaking about pidgin, one probably shouldn't forget about google talk.

Other search terms related to pidgin and their ratings are:
★★★★★ google talk
★★★★ otr
★★★ facebook
★★★ lync
★★ office communicator
★ openfire
★ jabber
★ sametime
communicator
You have in mind a companion for pidgin and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of pidgin in all years. Click on graph for more.
pidgin
digsby
trillian