yes @icaro, SteemConnect was created by the creators of Busy.org and it is the safest way to login in to any other Steem powered site.

It will not store your password or active key, instead it serves as a thirdparty login app that all Steemians use to login to other Steem powered sites.

Once you login to SteemConnect, you can use it to login to every other Steem powered sites without every giving your login to the other sites. So you only login to Steem connect and them use it to connect to other sites without every logging to those sites.

Steem connect is very powerful and is be used for delegations of Steem power as well as creating new Steem accounts.

it is run by @fabien - the creator of SteemJS API, @Busy and @Steemit so you can trust it. here is the initial official announcement post > https://steemit.com/steemconnect/@busy.org/steemconnect-beta-release-note

visit their homepage > https://SteemConnect.com