In the What topics can I ask about here? page it clearly states that:
Ask Different is for users of Apple products. If you have a question about ...
- Apple hardware
- Apple software
- Apple services including iTunes Connect (selling music, books, apps)
- third-party hardware, services and software when associated for use with Apple products.
... then you're in the right place to ask your question!
Recently bmike corrected me because I had assumed a question about a formula in Excel was off-topic. I accepted his correction (obviously, as a moderator with the highest reputation I wasn't going to think he was wrong!), but since then I've seen a number of instances where users have voted to close questions as off-topic because the questions were about third-party software.
This got me to thinking that perhaps the What topics can I ask about here? page could do with some minor revision. It may be something as simple as a formatting change to bold the words "third-party hardware, services and software" in the last bullet point.
What do others think?