While the software itself is excellent, the forum is the beating heart of the ecosystem. Here is why you should stop lurking and start participating. One of the rarest things in open-source and freeware today is direct access to the developer. On the XnView forum, Pierre Gougelet (the author) is active daily.
But it is effective .
If you are still using Classic, the forum will gently (or not so gently) encourage you to switch. MP is faster, 64-bit, and actively maintained. Listen to them. The XnView MP forum isn't glamorous. It uses an old-school phpBB layout, the search function is basic, and there are no reaction emojis or "likes." xnview mp forum