Less Wrong Product & Service Recommendations

lukeprog

I have often benefited from recommendations for Things I Didn't Know I Wanted.

Given that Less Wrong is a community of unusually intelligent, critical, and self-improvement-focused people, I suspect we can generate a pretty helpful thread of product recommendations — perhaps even a monthly thread of product recommendations.

Rules:

Post one product your recommend per comment, so they can be discussed and voted on independently.
Provide a link for purchasing the product.
No books, movies, TV, games, or music. (These should go in other threads, like this one or this one.)

I'll post my own recommendations to the comments section, too.

I have often benefited from recommendations for Things I Didn't Know I Wanted.

Rules:

Post one product your recommend per comment, so they can be discussed and voted on independently.
Provide a link for purchasing the product.
No books, movies, TV, games, or music. (These should go in other threads, like this one or this one.)

I'll post my own recommendations to the comments section, too.

I was surprised to find out that you cannot easily save PDF from a webpage to reliably keep it on the phone forever; it will be subject to cache retention policy.

Really? If you were referring to the iPhone, my experience is this. PDF links open by default in the browser, which copy only exists as a temporary cache. However, the window includes an "Open in iBooks" button, and using it saves a permanent copy to iBooks. iBooks is an Apple app that comes with the phone. There's also an "Open in..." button letting you save it to any app that has indicated it is able to handle a PDF -- I also have GoodReader.

Yes, it was on iPhone (specifically iPhone 1) and the owner said that he is disappointed by the situation and knows no solution. Maybe Apple fixed this problem later among some others like copy-paste.

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