Without Blogger, I have to spend money every year to rent a shared server just to write a blog.
Without YouTube, I can only waste time on domestic video sites that are heavily censored.
Without Maps, I can't find my way when I go out. With Google Maps open on my phone, I can't use the signal towers to figure out where I am, and I get lost...
Without Calendar, no one will quietly and for free send me a text message reminder: today is a certain girl's birthday...