No, although you can use them free of charge for a certain length of time (described in the documentation for each program).

We encourage you to use the free trial versions to make sure that you like the program before you buy it. This gives you an opportunity to make sure that the program works correctly, and that you think it's worth the money we're asking for it.

If you don't like it after trying the free trial version, simply remove the program from your disk.

If you do like it, though, and want to keep using it, we ask that you buy the program from us. It's that simple.

 
See also:
How much does each program cost?
How do I pay for one of your programs?
Will I be billed if I use a trial version for longer than the "trial period"?
How do I permanently remove Holiday Lights for Windows if I don't want to buy it?
How do I permanently remove Holiday Lights for Macintosh if I don't want to buy it?