| Communication | |||
| Title/Description | Platform | Company/Website | License ($USD) |
| Adium X Multi-service instant messaging client for Mac OS X | Mac OS X | Adam Iser | Freeware |
| AOL Instant Messenger Instant messenger not just for AOL members | Mac OS 9, Mac OS X, Windows | America Online | Freeware |
| Direct Mail Bulk-email application for Mac OS X | Mac OS X | ernieWare | $25.00 |
| eMail Extractor Extract e-mail addresses from all kind of files | Mac OS 9, Mac OS X, Windows | MAX Programming | $16.90 |
| Eudora Email Email client with SpamWatch | Mac OS X, Windows | QUALCOMM | $49.95 |
| Fire Multi-protocol instant messenger client for Mac OS X | Mac OS X | Epicware | Freeware |
| ICQ Chat, send messages, files & URLS's, & more | Mac OS X, Windows | ICQ | Freeware |
| Mailsmith Extra-strength e-mail client for the Macintosh | Mac OS X | Bare Bones Software | $99.00 |
| MaxBulk Mailer Contact large numbers of clients and customers | Mac OS 9, Mac OS X | MAX Programming | $39.90 |
| Monsoon Mass Mailer Cost-effective bulk mailer | Mac OS X | Information Services & Information Systems | $34.50 |
| MSN Messenger Microsoft's instant messenger | Mac OS X, Windows | Microsoft | Freeware |
| Proteus Connect to all the popular instant messaging services | Mac OS X | Defaultware | Shareware |
| QuickMail All-in-one e-mail package perfect for business needs | Mac OS X, Windows | Outspring Software | $35.00 |
| SendStudio Email marketing software | Linux, Windows | Interspire | $239.00 |
| Skype Call other people on their computers or phones | Mac OS X, Linux, Windows | Skype Technologies | Freeware |
| Thunderbird Mozilla's next generation e-mail client | Mac OS X | Mozilla | Freeware |
| Yahoo! Messenger Instant messenger by Yahoo! | Mac OS X, Windows | Yahoo! | Freeware |
