pgrep and pkill alternatives on mac os x?

On OS X Lion with Homebrew:

$ brew install proctools

This downloads, builds and installs pgrep, pkill and pfind.

You don't need an alternative anymore: since MacOS 10.8 pgrep and pkill are available by default.

You could use MacPorts: sudo port install proctools

Here's the result of port search pgrep:

proctools @0.4pre1 (sysutils)
    pgrep, pkill and pfind for OpenBSD and Darwin (Mac OS X)

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