cTrader is the trading platform that was developed by the Cyprus-based company Spotware back in 2011. It is today offered by a number of CFD & forex brokers, some of which offer stock trading with CFDs to their clients. The platform is known for its good design and intuitive charting capabilities, but is still far less used than platforms like MT4 & 5.
cTrader supports a variety of trading instruments, including CFDs based on stocks and a range of other underlying assets. The platform has been tried and tested over many years, and is now generally considered a highly reliable trading platform. Among the brokers that offer cTrader, almost all of them offer it as just one out of many other platforms.