For me, a massive advantage of Alfred is the clipboard history. I know there are plenty of other clipboard managers, but I've tried them all, and Alfred's works the best for me.

Features I like:

* Ability to set upper-bound on individual size

* Ability to ignore clipboard CF_ types

* Ability to retain variable amounts of data by time

* Ignore certain apps' clipboards

* Filterable history search

* Short and long content previews

I also use iTerm, but that's mainly for the performance benefits and customizability - I could live without it vs Terminal.app.