Ones I know of:https://cryptfolio.com - 11 coins
https://csnapshot.com - cryptsy only
https://myaltcoins.com - has some idea of past transactions and data import
https://cryptrader.com - works of API keys for each exchange (6 exchanges)
http://forum.feathercoin.com/index.php?topic=3689.0 - android app(seems broken atm)- they even mentioned me as there competitor
The reason for the "UUID URL links" is, this way I have no info on you, no email, no address, no username, no password.
Theirs nothing I, or anyone else who may be able to comprise the site can use to target you.
With the services above they almost all require usernames and passwords - if you decide to try them out please use a password manager and
randomly generated passwords.
ive decided to keep the code private, sorry
RE: read only - still want to do it at some stage