Airmail
An email client that allows you to create OmniFocus actions that reference emails, manually or automatically using rules.
OmniFocus Integration
DEVONthink
DEVONthink is a powerful data storage and research app for Mac, iPhone, and iPad that's a natural complement to OmniFocus. Through the use of links, you can have a vast amount of data at your fingertips as you work on tasks in OmniFocus.
Drafts
Quickly and conveniently and capture text and then send it to OmniFocus and other destinations through the use of flexible, customizable actions.
Fantastical
An alternative to Apple's Calendar app for Mac, iPhone, and iPad that provides enhanced functionality, a natural language interface, and OmniFocus integration.
Hook
Hook for macOS makes it possible to link your OmniFocus projects and actions to almost anything, including files, folders, notes, websites, and emails.
IFTTT
IFTTT (If This Then That) is a web-based service that can be used to automatically trigger the creation of OmniFocus actions 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 iPhone and iPad.
Mailplane
An email client that combines Gmail's web interface with a slew of additional features, including integration with OmniFocus.
Postbox
An email client for Mac and Windows that's speedy, customizable, and extensible. The Mac version includes native support for OmniFocus.
Spark
A polished email client for Mac, iPhone, iPad, and Apple Watch with a focus on email prioritization. Spark also has innovative support for teams and integration with OmniFocus.
TaskClone
Use Evernote to take notes and to capture action items. Then add a tag to the note and TaskClone will automatically create an OmniFocus action for each of your action items.