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

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

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)

ethers - "high-level" all-in-one umbrella quick starter gem for easy installation & usage for ethereum & co. (blockchain) contract services in ruby

etherscan-lite - light-weight machinery / helper for the Etherscan (blockchain) JSON HTTP API / web services (note: API key sign-up required)

ethlite - light-weight machinery to query / call ethereum (blockchain contract) services via json-rpc (incl. tuple support)

ethlite-contracts - ready-to-use (blockchain) contract services / function calls for ethereum & co.

ethname - light-weight crowd-sourced "off-chain" ethereum name to (contract) address service / helper (incl. punks v1,v2,v3,v4; phunks v1,v2, synth punks, punk blocks, nouns, nouns descriptor, synth nouns, etc.) - yes, you can! - add more names / contracts via git ;-)

fbtxt-document - football.txt match readers (incl. Fbtxt::Document) and more

fbtxt-lexer - football.txt match lexer (& tokenizer)

fbtxt-parser - football.txt match parser (& tokenizer)

fbtxt-pp - pretty print (pp) football match fixtures & results in the football.txt format

fbup - (auto-)update machinery for footbal match schedules & more in football.txt; incl. (auto-sync & commit) support for github openfootball repos & more

fifadat - get football data via the (unofficial) fifa api

fifadat-convert - convert fifa api json

football - football data structures for matches, scores, leagues, seasons, rounds, groups, teams, clubs and more

footballdata-api - get football data via Daniel Freitag's football-data.org api v4