From what I see on the list I am deducing that you work with rails most of time. If that is correct, that is what you should have aimed for "Ruby/Rails Resources Page".

I guess it would have worked better if you had created separate page for Apple resources(just thinking out loud; I do not know anything about Apple app development).

There is a lot of stuff that can be categorized as generic tools and not anything specific to hackers. Either should have been a separate part list or not at all(I am not sure many "hackers" [want to]use 37Signals services).

Listing of resources is almost useless to the reader if you do not provide a short explanation on why you think the tool is on your list. This saves readers' time. Hackers love knowing opinions; even if they don't agree.

Finally, You should have included only those topics on which you possess a good level of expertise.