These porgrams are absolutely free to use! You can also feel free to give them to anyone you like! There are only two things you have to mind (and agree if downloading it): Using any of these programs you:
1) Acknowledge that these programs are provided to you “as is” and you use them at your own risk. Acknowledge that no promise, representation, warranty or undertaking has been made or given to you. Authors and distrubutors are not liable for any damages whatsoever may occure during the use of the software.
2) Acknowledge that the only purpose of these programs is to make your work more comfortable. Acknowledge that you must fulfil your obligations to all other parties completely.