I know blockchain.info used to have this fucntion but now... is tehre any service?
You mean the ability to generate multiple addresses and see balance in each one of them ? It's no longer possible with Blockchain.info as they became an HD wallet[1] , this is also valid for Blocktrail.com (BTC.COM) . Other online wallets don't give you access to your private keys as far as I know. I guess you are left with Electrum (desktop wallet) as the last choice as Multibit also became an HD wallet.
[1]
https://en.bitcoin.it/wiki/Deterministic_walletblockchain.info does allow you to access your private keys. Deterministic wallets can allow you to spend from specific addresses. I am unsure if blockchain.info currently allows you to spend from specific addresses though.
Electrum is by far the best wallet IMO.
ever since they changed their wallet from legacy to this new version everything is much more complicated for users who want more than just a bitcoin address!
i think the option here is to create an additional wallet (inside the same account on blockchain.info) and assign addresses to that wallet and then spend from that wallet.