D programming language tutorial from the ground up.

Really extensive documentation and guided tour of the D language. From simple hello world to parallelism, concurrency, and manual memory management.

Amazing little library making writing 'scripts' in D so much easier: user interaction, shell commands, dry-run mode, return fail codes, and some more.

eBay's TSV Utilities: Command line tools for large, tabular data files. Filtering, statistics, sampling, joins and more. - GitHub - eBay/tsv-utils: eBay's TSV Utilities: Command line tools for large, tabular data files. Filtering, statistics, sampling, joins and more.

TSV data wrangling utilities from the command line.
Written in D language.