Mac Apps for E-mail Software

Mailbox

Free

Gmail client for the menu bar.

Entourage Time Machine

Trial version

Back up, browse, and restore all your e-mails.

FastEmailCheck Pro

Paid

check 10 OS X e-mail accounts simultaneously

Unibox

Paid

People-centric email client.

Mailsum

Paid

Mailsum gives you insight in your email behavior.

Kiwi for Gmail

Free

Access each application, open new documents, and get back to recent documents with a single click.

Intuem

Trial version

MIDI music authoring app.

LiSA

Paid

Receive email announcements made with a real human voice.

GTab

Free

Menu bar item for accessing your Gmail, with push notifications.

Mail Pilot

Paid

Task-oriented e-mail client.

Clean Email

Free

Keep your mailbox under control.

Airmail

Paid

Send your mail with lightning speed.

LiSA

Free

Speaks with a real human voice when e-mail arrives, telling you who it is from.

Google Notifier

Free

notifies you of new Gmail & upcoming Gcal events

Quickmailer

Paid

Menu bar widget that lets you quickly compose an e-mail without switching to your mail client.

Mail Designer

Trial version

Send irresistible invitations to friends, vital updates to business colleagues, and attractive newsletters to any and everyone.

Missing Socks Mail Free Trial

Trial version

Send anonymous e-mail or e-mail from any address.

Voice2Email - Free

Free

Instead of typing your emails: Just record your voice message and send as a small mp3-file.

Gmesk

Paid

Gmesk brings your Gmail accounts to your desktop to look and interact just like a normal mail client

Tab for Gmail

Paid

The ease and simplicity of Gmail, in your menubar.

Mail Perspectives

Trial version

Collapse Apple Mail into compact windows that don't take away your focus.

Voice2Email - Pro

Paid

Record your voice messages and send them as a small mp3 files via email

MailTabs

Free

Adds tabbed e-mail messages to Apple Mail.

YMailTab

Paid

Access your Yahoo Mail easily.