From the Flexikiller website:
There is a software industry dedicated to the production of full-fledged spyware to be sold to just about anyone. These products are hidden applications that, once installed, will silently monitor everything you do with your computer and phone. That includes watching you as you chat on Facebook, intercept your emails, steal your pictures as well as watch you through the webcam.
While this type of software is generally legally condoned because of it’s “legitimate” use in corporate environments and parental control, it is more often than not used to illegally spy on spouses and partners, enabling domestic abuses and violating one’s privacy.
FlexiSPY, which is just one of many spyware products commercially available online, is normally installed through having physical access to a device, but it really only takes minutes to infect a computer or a phone with it. The utilities you can find on this page, for the moment available for Windows and Mac, should help you identify whether FlexiSPY is installed on your computer and provide an option to remove it.
PLEASE READ CAREFULLY: uninstalling FlexiSPY through these utilities will likely remove all traces of its presence. If you think you might want to keep some evidence, for example for a potential legal litigation, you should not proceed with the uninstall and store your infected device safely.
Additionally, whoever might be spying on you could potentially notice your attempt to identify the infection by running these tools, and that could instigate some unwanted reaction on their part. Please, be careful, be wary of these risks and stay safe.