You'd be correct in assuming they're all Daily powers.
Salve of Power (AV, after errata) allows you to regain an encounter power at the expense of a healing surge as a minor action. 10th level.
Staff of the Magi (DMK), restores an encounter power of staff's level or below as a free action, once per day. Limited to arcane powers. 15th level.
Battlemaster's Weapon (AV), regain an encounter power as a minor action. 14th level.
Cloak of Translocation (AV2), regain an encounter power with the Teleportation keyword as a minor action. 9th level.
(note: my Compendium search was "regain encounter power" which should have captured them all, but may have missed some).