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 ;-)

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

Foreman plug-in for managing security compliance reports

A simple way to add honeypot captchas to Rails forms

JSON-RPC 2.0 client and server

KPeg is a simple PEG library for Ruby. It provides an API as well as native grammar to build the grammar. KPeg strives to provide a simple, powerful API without being too exotic. KPeg supports direct left recursion of rules via the {OMeta memoization}[http://www.vpri.org/pdf/tr2008003_experimenting.pdf] trick.

This gem automatically handles creation, renewal, and applying SSL certificates from LetsEncrypt to your Heroku account.

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

autotest is a continous testing facility meant to be used during development. As soon as you save a file, autotest will run the corresponding dependent tests. minitest-autotest is the latest incarnation of the venerable and wise autotest. This time, it talks to minitest via minitest-server. As a result, there is no output parsing. There are no regexps to tweak. There's no cruft or overhead.

Hunting down random test failures can be very very difficult, sometimes impossible, but minitest-bisect makes it easy. minitest-bisect helps you isolate and debug random test failures. If your tests only fail randomly, you can reproduce the error consistently by using `--seed <num>`, but what then? How do you figure out which combination of tests out of hundreds are responsible for the failure? You know which test is failing, but what others are causing it to fail or were helping it succeed in a different order? That's what minitest-bisect does best.

JRuby gem for performing multidimensional queries of relational database data using Mondrian OLAP Java library

Ruby Gem for RFC 3610 - Counter with CBC-MAC (CCM)

A interactive command line tool for evaluating and debugging the puppet language