Fpart is a high-performance C CLI tool that partitions filesystem trees into balanced subsets (called partitions) based on file count, size, or a fixed number of partitions. It uses a bin-packing algorithm to optimize space utilization. The tool supports live mode, where partitions are generated during filesystem crawling and hooks can trigger immediate actions (e.g., starting rsync transfers). Fpsync, a companion shell script, leverages fpart to parallelize data migrations using rsync, cpio, pax, or tar, with support for SSH workers, job queues, resume/replay, and email reports. The codebase is mature, well-structured, and portable across FreeBSD, Linux, Solaris, and macOS. It demonstrates strong C craftsmanship with careful memory management, error handling, and portability workarounds (e.g., embedded fts). The fpsync script is a sophisticated example of shell-based job scheduling and distributed synchronization.