What online services are you missing?

Hello.

I get rid of idleness and think about the need to create programs that somehow will be useful to people. I decided to arrange a mini-survey on the topic:

What online services are you missing?
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I would be glad if everyone offers 1-2 answers to this question.

PS: I myself am engaged in Flash development, it would be cool if the services offered by you somehow intersected with Flash, although it does not matter.

For earlier thanks to all.