My company currently uses OTRS. One of the features of OTRS is called "Bulk Action". This lets you place a checkmark beside a number of tickets, and then click a button. Then you can select actions to perform on all those tickets at the same time.
Some actions include:
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Add an internal note/comment
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Change the state (closed, open, etc...)
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Change the owner
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Change the queue
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Change the priority
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Merge tickets (to oldest selected, or to a specific ticket number)
It would be really nice to have a similar feature in eStreamDesk.