FreeFileSync allows comparing and synchronizing local file folders. It's performant and without GUI complexity. It detects moved and renamed files, detect conflicts, can operate on locked files, understands symlinks, allows automatic syncing, copyies extended file permissions (NTFS), and it's cross-platform.
SFK combines a hundred command-line and file operation tools into a single binary. It operates on single files, directories or trees, and even zip/tar archives. It provides text searching (also in binary files), search and replace operations, checksum generation, locating duplicate content, file splitting and merging, CR/LF linebreak conversion, hexdumping, colorization. There are also instant servers for FTP and HTTP or direct file transfers, or debug TCP/UDP and HTTP connections. It's also rel
FileBot can automatically rename tv show / movie files, and download subtitles. It requires little work, as media files can just be drag'n'dropped in for operation. It's cross-platform and comes with a command-line version.