UIPEthernet: A plugin-replacement of the stock Arduino Ethernet library for ENC28J60 shields and breakout boards. Full support for persistent (streaming) TCP-connections and UDP (Client and Server each), ARP, ICMP, DHCP and DNS. Build around Adam Dunkels uIP Stack. Further developed version can be found on https://github.com/UIPEthernet/UIPEthernet
A popular library installation technique is to download the library via GitHub's Clone or download > Download ZIP and then use the Arduino IDE's Sketch > Include Library > Add .ZIP Library on the downloaded file. This requires the library to be in the root of the repository, not in a subfolder. If the library is not in the root of the repository this installation technique fails:
Specified folder/zip file does not contain a valid library
A popular library installation technique is to download the library via GitHub's Clone or download > Download ZIP and then use the Arduino IDE's Sketch > Include Library > Add .ZIP Library on the downloaded file. This requires the library to be in the root of the repository, not in a subfolder. If the library is not in the root of the repository this installation technique fails:
This is the standard repository structure used in all official Arduino libraries: https://github.com/arduino-libraries
This move is also required if you wanted to add your library to the Arduino Library Manager index, which provides an even easier installation option.