SNP defines two primary protocols which allow computers to generate notifications using Snarl running on a remote (or local) computer. One flavour of SNP is better suited to corporate networks; the other can work across the Internet.
Check out the following for more information:
- The Wiki contains a lot of information about the different flavours of SNP and ready-made tools and demos you can try out
- The Developer Guide is where you can find the formal SNP documentation
- You can download various SNP clients, servers and development tools from SourceForge