You could have downloaded RDC 2.0 for Mac from our application library for free. The software lies within System Tools, more precisely Remote Computing. The bundle identifier for this app is com.baritchisoftware.RDC. The most popular versions among the application users are 2.0 and 0.4. This free software for Mac OS X is a product of com.baritchisoftware.
From the developer:
Remote Desktop Connection front end. It uses rdesktop for linux (you can install it with fink or darwinports). Added parameters (to be sent to rdesktop) field to each host. Added prefereces panel and path to rdesktop file in preferences.
You may want to check out more software for Mac, such as RDC-i Mounter, which might be similar to RDC.
Remote Computing
Remote Computing