Thank you very much for the valuable answers!
Although the original question was about simulated accounts, we have already received a great number of very useful additional tools and I would like to keep the thread open for even more.
Personally, I have recognized myself to be using
bitinfocharts more and more recently.
Great free tool for the collection of information about blockchains, altcoins supported and they have a nice API for project developers.
Nobody has mentioned TradingView yet. I guess it's worth suggesting if you are planning to immerse yourself a little deeper into the technicalities of crypto trading.
They have a demo platform for those who wishes to learn charting. As everybody knows, coming up with a reliable technical analysis is never easy. But it's more or less a must if you wish to be a profitable day trader. So you might want to get yourself familiar with all kinds of charts, technical indicators, smart drawing tools, and so on. This is offered by TradingView.
As far as I know, TradingView is poisoned by account trading (at least the crytocurrency part).
On a business scale, scammers buy premium (PRO, TOP...etc.) accounts then use them to advertise scam services.
I have personally seen at least one bot account promoting at least one shady service under all TA I read there.
Is it the normal or was I just unfortunate?