Hearthpwn

Are there any cards that trigger an effect when a friendly minion dies? 

The Pally secret Avenge and Backroom Bouncer are the first to come to mind.

Duplicate too.

Cult master backroom bouncer

Quote from BaconWizard >>

Are there any cards that trigger an effect when a friendly minion dies? 

Quote from Ganashal >>

Quote from BaconWizard >>

Are there any cards that trigger an effect when a friendly minion dies? 

 I think just secrets like Avenge, or Effigy etc? 

Oh, and Cult Master

Minions: Bolvar Fordragon, Usher of Souls, Backroom Bouncer, Cult Master, Flesheating Ghoul

Secrets: Avenge, Duplicate

Other related effects: Kel'Thuzad, Baron Rivendare

And of course you could say that any card with death-rattle could sort of fit into your description as well, but I expect that's not what you were looking for. Hope this helps :)

Quote from MrZNF >>

Minions: Bolvar Fordragon, Usher of Souls, Backroom Bouncer, Cult Master, Flesheating Ghoul

Secrets: Avenge, Duplicate

Other related effects: Kel'Thuzad, Baron Rivendare

And of course you could say that any card with death-rattle could sort of fit into your description as well, but I expect that's not what you were looking for. Hope this helps :)