Spinner
google.com
google.com
https://www.google.com/search?q=roll%20dice
https://www.google.com/search?q=random%20number%20between%20...
Probably fairly easy for engineers to add these
My favourite is still this though: https://www.google.com/search?q=3*cos(sqrt(x*x%2By*y))%2B5
Try 100/100 min/max for the random number generator. Interesting what you can find poking around the JS.
Or -99999999999/99999999999.
90% it's engineers doing something they think is cool/kooky/funky without thinking about the consequences. As in, you know those top two sites have taken a hit on revenue because someone on a fat salary at Google wanted to do something cool with their 20% time, or some similar story.
But there's always this 10% suspicion, which is perhaps amplified by the controversy around AMP - and maybe it's a little bit unfair - that they ultimately never want you to leave the Google site.
That may be the case but, even if it's not, they do this stuff that they think is cool, but they do it without any sense of responsibility or empathy.
That solitaire game is a fairly limited implementation - admittedly rather a nice one - and it lacks a lot of the variants, and other bells and whistles of the top solitaire sites. Nevertheless it's going to be up there for all time, stealing traffic from and reducing the revenue to those other sites, and it won't make a jot of difference either way to Google.
I don't really think that's OK.
calculator
color picker
unit converter
I didn't find anything about the other features mentioned here though.Although I know its much easier for me to say that as a non-Googler than it may actually be :p
https://duckduckgo.com/?q=roll+4d4%2B4
Wolfram Alpha also supports it (see example at bottom), but much slower:
https://www.wolframalpha.com/input/?i=roll+4d4%2B4
Google and Bing support dice rolls, but not the rpg-syntax.
daniel@pancake:~$ duckgo roll seven dice --- Type: Exclusive Answer: Answer: ", , , , , , " Type: dice_roll
Still waiting on my answer :(
Edit: Nevermind, already fixed
Ah, the internet.
There are many, many servers involved to display a results page. These things probably are an RPC to a dedicated server. Haven't checked though.
Attention to detail: Replacing the ש with a פ when spinning in Israel.
http://www.bing.com/search?q=speed+test&qs=n&form=QBLH&sp=-1...
That's like, what their specialty is.
https://www.google.com/search?q=google+easter+eggs&tbm=vid
"about 1,700,000 results"Flip a coin
Roll a dice
Play Pacman