You can download iCanSleep 1.02 for Mac from our application library for free. The actual developer of this free software for Mac is Steffen Itterheim. The software lies within Productivity Tools, more precisely Timekeeping.
From the developer:
iCanSleep is a free, open source status bar tool to prevent your Mac from sleeping for a while.
The main point of this tool is to allow the Mac to go back to "I can sleep" mode again after the "no sleep" period is over (hence the name) without having to change Energy Saver settings.
You may want to check out more Mac applications, such as Simple Reminder, MulberryAdmin or CoolBigClock, which might be related to iCanSleep.