testssl.sh is a free, open-source command-line tool that scans servers for TLS/SSL cipher, protocol, and cryptographic flaw support on any port. It requires no installation, works across Linux, macOS, BSD, and Windows environments, and outputs results in human-readable, CSV, JSON, or HTML formats.
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THE FIRST COLLECTIONRustyCSV is a high-performance CSV parser for Elixir, built as a Rust NIF with SIMD acceleration, parallel parsing, and bounded-memory streaming. It serves as a drop-in replacement for NimbleCSV.
VisiData is a terminal-based multitool for exploring and arranging tabular data, supporting formats like tsv, csv, sqlite, json, xlsx and hdf5. It runs on Linux, macOS or Windows with WSL and requires Python 3.8+.
yq is a portable command-line processor for YAML, JSON, XML, CSV, TOML, HCL, and properties files, using a jq-like syntax.
JSON Crack is an open-source tool that turns JSON, YAML, XML and CSV into interactive graphs and trees. It formats and validates data, converts between formats, generates code and JSON Schema, runs jq and JSON path queries, and exports images, with all processing done locally.
A comprehensive, community-maintained dataset of countries, states, cities, and postcodes, available in 12 formats including JSON, SQL, CSV, and more. Includes ISO codes, capitals, native languages, timezones, and translations. Free under ODbL license with attribution required.