TemperatureMonitor 4.99 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within System Tools, more precisely Device Assistants.
The most popular versions among the program users are 4.98, 4.97 and 4.9. The actual developer of this free software for Mac is Marcel Bresink Software-Systeme.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The bundle identifier for this app is com.bresink.system.tempmonitor. Temperaturemonitor.dmg is the common file name to indicate the TemperatureMonitor installer.
From the developer:
Temperature Monitor is an application to read out all accessible temperature sensors in Macintosh computers. The program can visualize the history graphs of the readings, display measured values in a large variety of fashions, or announce readings by speech output. It can also store and export values.
You may want to check out more Mac applications, such as MagicPrefs, iPodDisk or iVolume, which might be related to TemperatureMonitor.