Free
MacStumbler
Detect 802.11 networks in your area thanks to your Airport
Your download will start automatically. If it doesn't, restart it.
Apple’s IDE for building apps across Apple platforms
The latest free upgrade for Mac
Build and deploy rich web apps on your desktop
UpCast: A Development Tool for Mac
Effortless Office 365 Email Backup Solution for Mac Users
Get information on your website
Access, Read, and Manage OLM Data Seamlessly on Mac
A trial version app for Mac, by joanbussiness.