Good list of useful services, most of them are widely known if you are interested in bitcoin. But some of them (especially mobile services) I didn't know.

Is http://bitcoincharts.com/ being updated anymore? I checked the site and it seems that latest news from main page are from mid-late 2014.

You are right. Google shows latest bitcoin price in our local currency. I prefer preev to see the weighted bitcoin prices across different exchanges. Blockchain,info also provide weighted bitcoin prices.

this topic looks to me like an advertisement of preev (dot) net and not the one that we have already been using preev.COM and newbie account with only 2 post and another with only 1 post saying the .net is the best makes me suspicious, but maybe it is just me!!

i personally use bitcoinwisdom, it has a lot of features if you need to do some technical analysis and you can watch the prices of the major exchanges

i agree, bitcoinwisdom is the best because it has all the major bitcoin exchangers in one place with all the data you might need to study the market and compare them to other places. and at the same time it has a couple of other altcoins like ltc too.

Look like Bitcoin Ticker widget is not on the list.

It's an Android application that really has it all. They have some price monitor of almost all of major bitcoin exchanges.

The interface is easy to learn.

What I like here, even I away at my desktop, it has alarm that will triggered your target value.

That's useful topic for the traders especially and helping them to predict the next pricing levels , and it's also helping the Bitcoin's holders as well , but i think it's better nowadays to hold the bitcoins for the long term run

I used a lot preev.net/com at the beginning but now I prefer bitcoinwisdom for all the features that it has. Preev.net is simple but maybe too simple. I like to be able to look at the graph, indicators and use lots and lots of tools, which preev.com doesn't allow for. If I need to check the price in New Taiwan Dollars I use bitoex, which is basically an exchange (but has many more features) that only works for TWD though. Anyway that's the only reason I would use preev.whatever : check the current NTD rate.
Also as you said http://bitcoincharts.com/ is great for historical research.
And sometimes I also have a look at http://blockchain.info/charts, for other non-price related data that I can't find elsewhere (and they have plenty).

Great list I bookmarked some of the sites for comparison,I am currently using preev and I had the hitbtc bitcoin price widget on my site
Preev is always update and I like it's simple interface..

I like Preev a lot and use it on all my devices it's fast to load and calculate values on the fly without any slowing down due to fancy interface.