ESTEEM8

ESTEEM8 is a free web application that lets you interact with blockchain Steem. as well as writing posts, commenting, upvote, etc.

In my opinion this application is very similar to the esteem application that was founded by good-karma. But, this is a web application, while esteem is a mobile application.

For security: you don't need to worry because this Application doesn't take your data, it's given to your browser and from there you can choose the node you want to connect.

You can also access this web app from any device with a web browser or with your mobile.

They also have open source which you can find here.