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)

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 ;-)

fast_xs provides C extensions for escaping text. The original String#fast_xs method is based on the xchar code by Sam Ruby: * http://intertwingly.net/stories/2005/09/28/xchar.rb * http://intertwingly.net/blog/2005/09/28/XML-Cleansing _why also packages an older version with Hpricot (patches submitted). The version here should be compatible with the latest version of Hpricot code. Ruby on Rails will automatically use String#fast_xs from either Hpricot or this gem version with the bundled Builder package. String#fast_xs is an almost exact translation of Sam Ruby's original implementation (String#to_xs), but it does escape """ (which is an optional, but all parsers are able ot handle it. XML::Builder as packaged in Rails 2.0 will be automatically use String#fast_xs instead of String#to_xs available.

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

football-sources - get football match data (leagues, cups & more) via web pages or web api (json) calls

FXRuby is the Ruby binding to the FOX GUI toolkit.

Use any HTML template as a theme generator for your Rails app. Installs an HTML template, and its CSS, JavaScript and image assets into your Rails app, ready to go in an instant. You just tell it which DOM elements are special, e.g. where to put the <%= yield %>, load your app in the browser and see the theme in action.

Generate meme images using http://memegenerator.net! Save yourself some time!

merkletree - build your own crypto hash trees; named after Ralph Merkle who patented hash trees in 1979; grow your own money on trees