1. Crit-bit tree. cr.yp.to/critbit.html. Crit-bit tree. cr.yp.to/critbit.html.
2. Exim Internet Mailer. exim.org. Exim Internet Mailer. exim.org.
3. In-kernel memory-mapped I/O tracing. kernel.org/doc/Documentation/trace/mmiotrace.txt. In-kernel memory-mapped I/O tracing. kernel.org/doc/Documentation/trace/mmiotrace.txt.
4. MySQL : The world's most popular open source database. mysql.com. MySQL : The world's most popular open source database. mysql.com.
5. pmem.io: Persistent memory programming blog. pmem.io. pmem.io: Persistent memory programming blog. pmem.io.