Apps like Network calculator

Here are some great alternatives to Network calculator by Michael Kochiashvili :
IPTools
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IP Calculator
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VLSM and Subnet Calculator and
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IPv4 Calculator
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Subby
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Network Tools
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WRPN 16c
WRPN 16c
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IP Tools - Router Admin Setup
IP Tools - Router Admin Setup
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TechCalc+ Calculator
TechCalc+ Calculator
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