Pure Java Network Tools
One hundred command line tools in a small and portable binary.
Development toolkit for Web Services and XML data bindings for C & C++
32/64 bit multi-platform Modbus communication library
OpenDDS is open source publish/subscribe middleware
Middleware for distributed applications
Open Source for Internet of Things
Hexadecimal and raw packet injector and sniffer.
Various TCP/IP servers, clients and network management tools
Proxies data from stdin/stdout/stderr and logs it in pcap files.