I like the fact that Open Office is free. "Microsoft Office will cost you about between $125 - $250 depending on if you own a previous version or not."
"Open Office encourages you to share, change or modify the program to best meet your needs. With closed-source software, changing the code would violate your user agreement and may violate laws." Your not allowed to share Microsoft Office Software with anyone else.
I have been using LiveLeak since I found out about it through Learn 2.0. I use Live Leak along with Youtube.