Dispatch
Quickly process your emails and take action when you're on the go. Built-in OmniFocus integration allows you to conveniently create OmniFocus actions that reference your emails.
Drafts
Quickly and conveniently and capture text and then send it to OmniFocus and other destinations through the use of flexible, customizable actions.
Evernote
Evernote is a natural complement to OmniFocus. Use it to store ideas for upcoming projects and as a repository for project reference material.
Hazel
Using Hazel for Mac and a little AppleScript, actions can be automatically created in OmniFocus for Mac (Pro) as files are added to specific folders.
IFTTT
IFTTT (If This Then That) is a free web-based service that can automatically trigger the creation of actions in OmniFocus based on a wide range of conditions.
Launch Center Pro
Launch Center Pro can be configured to provide quick and convenient ways to create and access OmniFocus tasks on iOS.