There might be an oversaturation of Mac native apps on the HN front page relative to Linux/Windows native apps. I, too, feel a bit disappointed when they are posted for the same reason as SomeCallMeTim (especially if it's not clear from the post's title that it's Mac exclusive and it only becomes apparent deep into the linked page), but I also know there are tons of native tools for Windows and Linux — they're just not discussed here as often. Though this could also be confirmation bias on my part.