digest-lite - crypto(graphic) hash functions / classes - Digest::KeccakLite (512bit, 256bit, etc), Digest::SHA3Lite (512bit, 256bit, etc) in "100% pure" ruby "lite" scripts, that is, without any c-extensions and with zero-dependency

Graph is a type of hash that outputs in graphviz's dot format. It comes with a command-line interface that is easily pluggable. It ships with plugins to graph dependencies and status of installed rubygems, rake tasks, homebrew ports, mac ports, and freebsd ports, coloring leaf nodes blue, outdat...

Colored red/green output for Minitest

Looksee lets you examine the method lookup path of objects in ways not possible in plain ruby.

sportdb - sport.db Command Line Tool

abidoc - application binary interface (abi) documentation generator for Ethereum & Co. (blockchain) contracts

abidump gem - command-line tool to dump / pretty print or (re)format application binary interfaces (abi) for Ethereum & Co.

"high-level" all-in-one umbrella quick starter gem for easy installation & usage application binary interface (abi) code or doc(umentation) gen(eration) for ethereum & co.

alphabets - alphabet (a-z) helpers incl. unaccent, downcase, variants, and more

base32-alphabets - base32 (2^5) encoding / decoding in 5-bit groups with kai, crockford or electrologica notation / alphabet

base58-alphabets - base58 encoding / decoding numbers, hex or binary strings (incl. leading zeros) with bitcoin or flickr notation / alphabet

blockchain-lite - build your own blockchain with crypto hashes - revolutionize the world with blockchains, blockchains, blockchains one block at a time

centralbank - print your own money / cryptocurrency; run your own federated central bank nodes on the blockchain peer-to-peer over HTTP; revolutionize the world one block at a time

crypto-lite - cryptographic secure hash functions and public key signature algorithms made easy

cryptoquotes - incl. oracle tool to get a random crypto quote of the day on the command line - on the new new 'in math we trust' ponzi economics - on get-rich-quick blockchain secrets - on bitcon maximalists, scammers, morons, clowns, shills & bagHODLers and more

date-formats - read / parse and print dates (and times) from around the world

DNS Service Discovery (aka Bonjour, MDNS) API for Ruby. Implements browsing, resolving, registration and domain enumeration. Supports avahi's DNSSD compatibility layer for avahi 0.6.25 or newer.

elliptic - elliptic curve digital signature algorithm (ECDSA) cryptography with OpenSSL made easy (incl. secp256k1 curve)

elliptic-lite - elliptic curve cryptography from scratch / zero - start with finite fields, add elliptic curve points and point addition and scalar multiplications, add the elliptic curve digital signature algorithm (ECDSA) using the secp256k1 curve / group to sign and verify messages and more

enums - safe enumeration types - a set of symbolic keys bound to unique integer numbers (incl. bit flags option)