By John Gruber
Instabug: Understand how your app is doing with real-time contextual insights from your users.
$8.50 PDF e-book by Joe Fair, published by the Pragmatic Programmers. Might be useful even if you don’t program in Ruby, just to get a clear, concise guide to PayPal’s APIs and payment services.
★ Saturday, 10 March 2007
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