De (Dynamic Expression) module provides means to build and evaluate dynamic expression of arbitrary complecity and operands/operators nature

Deadfire - lightweight css preprocessor

Manage deadlines of your tasks and show timer for you

DeadMan is an implementation of a dead man's switch to monitor jobs. It's a simple tool that gives visibility when jobs fail to run.

Share config securely with your servers and organization using AWS S3.

Works with V2 of the DEAR Systems / DEAR Inventory API as seen at https://dearinventory.docs.apiary.io/

Base generic debug bar implementation.

🪲 Unobtrusive debug logging for Ruby. NO LITTERING. Automatically log selected methods and their arguments as they are called at runtime!

An MCP (Model Context Protocol) server that provides LLM agents with access to runtime context of executing Ruby processes. Connect to debug sessions, evaluate code, inspect objects, and control execution flow via MCP tools.

Simple and easy to use presentation layer for your Rails models.

日付機能拡張ライブラリ

Hash値拡張ライブラリ

If you have decision algorithm that can be easily expressed in a table, this gem can help

Lightweight decorators using plain old Ruby objects.

DeclarativeGrid is a gem for rendering grids described in simple DSL

Creates an object from a csv row according to yml-file with mapping rules

Apply grammatical cases to words.

DecoLite is a little gem that allows you to use the provided DecoLite::Model class to dynamically create Decorator class objects. Use the DecoLite::Model class directly, or inherit from the DecoLite::Model class to create your own unique subclasses with custom functionality. DecoLite::Model includes ActiveModel::Model, so validation can be applied using ActiveModel validation helpers (https://api.rubyonrails.org/v6.1.3/classes/ActiveModel/Validations/HelperMethods.html) you're familiar with; or, you can roll your own - just like any other ActiveModel. DecoLite::Model allows you to consume a Ruby Hash that you supply via the initializer (DecoLite::Model#new) or via the DecoLite::Model#load! method. Any number of Ruby Hashes can be consumed. Your supplied Ruby Hashes are used to create attr_accessor attributes (or "fields") on the model. Each attribute created is then assigned the value from the Hash that was loaded. Again, any number of hashes can be consumed using the DecoLite::Model#load! method.

Convert JSON structures to CSVs

Convert XML to JSON with a DSL