Best command-line tools

Locate usage and typography issues in English prose

Command-line page imposition through LaTeX

Encode, decode, test, and inspect FLAC audio

Self-host temporary uploads through a web interface or CLI

Filter and aggregate network flow records

Optimize PNG compression and ancillary chunks

Compress PNG files with palette quantization

Translate between ABC music notation and MIDI

Use Linux networking tools with kernel-aware versions

Apply image-processing filters through several interfaces

Create and edit PDF bookmark trees

Incremental file transfer for repeat directory updates

Compare resolver and authoritative DNS answers

Read and write image metadata in many formats

Run parallel S3 and local-file operations from the command line

Serve one file or a directory from a self-contained command

Windows batch PDF processing with command-line control

Apply chosen rules to Markdown and plain text

A DNS command-line client with several encrypted transports

Arrange PDF pages for several booklet and binding schemes

Convert Japanese text encodings and kana forms

A command-line multi-system emulator with input remapping

Check spelling and inspect word forms from a terminal

Resolve large domain lists through a controlled DNS workflow