CUtlBuffer is a generic binary/text serialization buffer with endian control, delimited string handling, printf-style formatting, CRLF conversion, and overflow callbacks. It is self-contained, highly reusable across C++ projects needing compact wire-format or file-format serialization, and demonstrates mature low-level buffer engineering.

CUtlVector is a templated dynamic array with sorted insertion, predicate-based search, STL-compatible iterators, and careful memory-growth semantics. It is a standalone utility class that can be dropped into another C++ codebase with minimal effort, showing non-trivial container design and optimization discipline.

Provides robust hex, base64, and PEM encoding/decoding utilities including PEM body extraction and key text format handling. It is isolated from the rest of the networking stack, depends only on low-level byte operations, and is directly reusable in any cryptographic or key-management tooling.

A compact, self-contained RFC 5952-compliant IPv6 address parser/formatter with correct compression and case handling. It is a clean C module that can be extracted for network utilities, packet analyzers, or socket-address formatting without modification.

Implements Ed25519/Curve25519 keypair generation, parsing, and serialization, including OpenSSH private key PEM handling and authorized_keys public key output. This is a self-contained cryptographic key-management component with secure wiping semantics, reusable in authentication systems and secure messaging tools outside the game networking domain.