These are things that are generally useful, not debugger-related, but
that I couldn't find in the SRC libraries.

Find	  partition array about kth element, sort array (generic)
Log	  Write events onto terminal or into a log
Network	  TCP client and server code (internet sockets)
TextFind  Search a TEXT for a character in a set
TextHash  Hash function on TEXT
TextTable Hash table for TEXT
ToC	  Safe access to parts of M3ToC and Unix
UText	  Unique strings, generic to accomodate extension with properties
UTextWR	  Like TextWr but creates UText directly (for efficiency)
UnixError Encapsulate usual error checking after system call.
