Photog Calc is a tool for photographers to help with some (not so) basic calculations. Currently there is a calculator for a depth of field, an angle of field and a guide number calculations.
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Photo Editor by Aviary Free
A one-stop shop for any photo editing need." -Mashable "A very comprehensive photo editor...
See Through Camera Free
It is not surprising that the development of increasingly advanced technology.
Photofeed keeps all of your photos from all of your devices in one place safe and sound.