CurrentUserId module to get and set the current user in a Rails session

Provide Date #age_in_days, #age_in_years

Adds extensions and constants for days of the week

Date.stamp method for RFC ISO date stamp

Adds extensions for DateTime#rand, Date#rand, Time#rand

Adds extensions for DateTime#random, Date#random, Time#random

Email address validation using RFC 822 pattern matching regular expressions

Define the `==` method to compare two objects' classes, instance variables, and their values

Generate sample names, places, agents, tweets, etc.

File#rewrite method to safely write a tempfile then move it over an existing file

Geometry modules with strong types, e.g. a vector with width, height, depth.

Use the Google Maps API to geocode an address to a latitude and longitude

HashMore class to create a recursive hash

HTTP Status Codes as constants, such as Net::HTTP::Status::OK = 200

Integer#map method to run a block multiple times

Tool to parse the first bytes of a file and compare it to a list of known mime types.

Markdown general purpose classes

Generate a Markdown table of contents via headlines, links, and anchors

Math statitics methods for sum, mean, median, mode, variance, deviation, etc.

Metric names for numbers, such as kilo, mega, giga