I'm the developer of QViewer. I don't see why it can't be trustworthy I made it first for myself, because I needed it, then I shared it with other QlikView developers.
As for potential malware -- it's regularly checked for viruses not only by me but also by many people who download it. You can always verify downloaded file size -- it should be less than 200K or so. Basically, it's so small that any virus would increase its size significantly (up to several megabytes).
If you have any specific concern on mind - let me know.
Dmitry - After just a short while with QViewer I don't know how I managed before. I'm using QViewer together with QlikviewComponents and it works really great! It's a great combination for understanding what actually happens in the script.
Incedentally, I am using QViewer as well and it's really a quick and easy solution. Thanks a lot for that.
But my question was not specific to a tool. Let me give you an example:
You can create an android app and release it in your website. People can download and use the app on their device but if that harms the device by any means, Google is not going to take the responsibility. For that, your app has to be certified by Google to be released in android market. Similarly, if we are using a tool which is not approved by QlikTech and if that mess up anything in the client environment, QlikTech is not going to take any responsibility or provide any support. So I wanted to know whether there is any concept like 'QlikTech certified product' to use these extremely useful tools (makes a developer's life easy ) without any overhead.