I found this big pack icon freebie (265MB) 3D icon set you may interested, 3D Icons. All icons are designed in silver/gray color, flat and deep shadow effect applied to bring out cool 3D feeling.
3D Icons contained total 364 icons such as line graph, statistic, arrows, audio, video, photo, cloud, users, food & beverage, social media and more. Available in PSD format only and its not in vector shape but very high resolution, enough to use in most of the app UI design, enjoy!
Thanks UI8 the creator of this big 3D icon set for free download.
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Source: Read more about 3D Icons