Downloading Go4Launch 1.2 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. 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 actual developer of this free Mac application is 13cubed.
From the developer:
Go4Launch allows you to easily add startup tasks to OS X using launchd services! Go4Launch does all the behind-the-scenes work and creates a "template" shell script that you can modify (e.g., sudo vi /Library/BootScripts/go4launch.sh). Add your own commands to the shell script, save, and you're done! If you're looking for a more robust solution for managing launchd services, we recommend Lingon.