cwdiff vs UltraCompare

cwdiff is a free Linux command-line wrapper for wdiff. It adds directory comparison support and colorizes differences in the output. The README describes configuring it as a Mercurial extdiff command, then running comparisons with hg wdiff. Users can disable colors by adding --no-color to the wdiff options. The project is presented as a shell-language repository. Listed acquisition options include a tarball, MacPorts, Arch Linux AUR, NetBSD, and Gentoo packages. A NetBSD package page provides a NetBSD 10.0 binary for cwdiff 0.4.0 and lists no runtime dependencies. Documentation is hosted on junghans.github.io, and bug reports go to GitHub Issues. The associated maintainer account identifies Christoph Junghans, whose profile lists Los Alamos, New Mexico, USA. The NetBSD package page lists GNU GPL version 2. The plan is free.

UltraCompare compares and merges files, folders, and documents, including Word, Excel, and PDF. It can show two or three files side by side and lets users merge differences visually. Folder tools compare, merge, and synchronize directory structures, with rule-based automation available. For spreadsheets and other tabular data, it can compare and merge cells, rows, or columns, including across multiple Excel sheets. UltraCompare works as a diff and merge tool with Git, Subversion, and CVS. It can compare remote files over FTP or SFTP and by URL, and folders over FTP and network shares. ZIP, RAR, and JAR contents can be compared without extraction. Additional tools include highlighting for characters, words, or lines; options to ignore whitespace or case; editable comparisons; saved sessions; and HTML or text reports. The maker lists Windows, macOS, and Linux, while a fully functional Windows trial includes all features for 30 days. There is no free plan. Subscriptions start at $99.95 a year for Core or $119.95 a year for Enterprise; perpetual options cost 179.95 USD or 249.95 USD once.