There is a solution to every problem. But most often it is the problem you are not aware of. Let my solutions inspire you.
These applications are taken from real life. Most of them have once solved a problem for me, or still do. Some are also useful for many others. All are available for free.
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NetPorter: TCP port forwarder.netnetworksrcwindows★★
Simple port forwarder for multiple TCP/IP connections in situations where an IP router would be too bulky.
One item, ca. 820 lines of code, estimated development costs: 1 600 €