| 1 | 13 | 7 | json | This is a JSON implementation as a Ruby extension in C. | 
        | 2 | 51 | 11 | rexml | An XML toolkit for Ruby | 
        | 3 | 96 | 95 | msgpack | MessagePack is a binary-based efficient object serialization library. It enables to exc... | 
        | 4 | 110 | 113 | webrick | WEBrick is an HTTP server toolkit that can be configured as an HTTPS server, a proxy se... | 
        | 5 | 141 | 3 | base64 | Support for encoding and decoding binary data using a Base64 representation. | 
        | 6 | 171 | 56 | net-imap | Ruby client api for Internet Message Access Protocol | 
        | 7 | 210 | 14 | logger | Provides a simple logging utility for outputting messages. | 
        | 8 | 216 | 93 | net-protocol | The abstract interface for net-* client. | 
        | 9 | 235 | 53 | date | The official date library for Ruby. | 
        | 10 | 298 | 47 | drb | Distributed object system for Ruby | 
        | 11 | 308 | 99 | irb | Interactive Ruby command-line tool for REPL (Read Eval Print Loop). | 
        | 12 | 334 | 169 | matrix | An implementation of Matrix and Vector classes. | 
        | 13 | 369 | 98 | mutex_m | Mixin to extend objects to be handled like a Mutex. | 
        | 14 | 395 | 100 | stringio | Pseudo `IO` class from/to `String`. | 
        | 15 | 412 | 48 | securerandom | Interface for secure random number generator. | 
        | 16 | 431 | 145 | net-http | HTTP client api for Ruby. | 
        | 17 | 438 | 135 | csv | The CSV library provides a complete interface to CSV files and data. It offers tools to... | 
        | 18 | 543 | 246 | optparse | OptionParser is a class for command-line option analysis. | 
        | 19 | 610 | 355 | strscan | Provides lexical scanning operations on a String. | 
        | 20 | 614 | 179 | debug | Debugging functionality for Ruby. This is completely rewritten debug.rb which was conta... | 
        | 21 | 724 | 200 | nkf | Ruby extension for Network Kanji Filter | 
        | 22 | 753 | 857 | json_pure | This is a JSON implementation in pure Ruby. | 
        | 23 | 762 | 370 | openssl | OpenSSL for Ruby provides access to SSL/TLS and general-purpose cryptography based on t... | 
        | 24 | 764 | 115 | ostruct | Class to build custom data structures, similar to a Hash. | 
        | 25 | 821 | 1,178 | sigdump | Setup signal handler which dumps backtrace of running threads and number of allocated o... | 
        | 26 | 837 | 794 | sync | A module that provides a two-phase lock with a counter. | 
        | 27 | 856 | 109 | pp | Provides a PrettyPrinter for Ruby objects | 
        | 28 | 1,005 | 127 | prettyprint | Implements a pretty printing algorithm for readable structure. | 
        | 29 | 1,006 | 1,180 | e2mmap | Module for defining custom exceptions with specific messages. | 
        | 30 | 1,054 | 609 | set | Provides a class to deal with collections of unordered, unique values | 
        | 31 | 1,231 | 106 | erb | An easy to use but powerful templating system for Ruby. | 
        | 32 | 1,495 | 1,553 | thwait | Watches for termination of multiple threads. | 
        | 33 | 1,537 | 1,364 | digest | Provides a framework for message digest libraries. | 
        | 34 | 1,643 | 1,149 | net-ftp | Support for the File Transfer Protocol. | 
        | 35 | 1,723 | 2,845 | strptime | a fast strptime/strftime engine which uses VM. | 
        | 36 | 1,739 | 1,540 | forwardable | Provides delegation of specified methods to a designated object. | 
        | 37 | 1,815 | 1,519 | fileutils | Several file utility methods for copying, moving, removing, etc. | 
        | 38 | 1,840 | 2,035 | iconv | iconv wrapper library | 
        | 39 | 1,843 | 1,839 | rss | Family of libraries that support various formats of XML "feeds". | 
        | 40 | 1,905 | 592 | zlib | Ruby interface for the zlib compression/decompression library | 
        | 41 | 1,931 | 954 | time | Extends the Time class with methods for parsing and conversion. | 
        | 42 | 1,990 | 3,025 | cool.io | Cool.io provides a high performance event framework for Ruby which uses the libev C lib... | 
        | 43 | 2,093 | 758 | fiddle | A libffi wrapper for Ruby. | 
        | 44 | 2,382 | 1,151 | abbrev | Calculates a set of unique abbreviations for a given set of strings | 
        | 45 | 2,522 | 3,818 | english | Require 'English.rb' to reference global variables with less cryptic names. | 
        | 46 | 2,526 | 1,843 | io-wait | Waits until IO is readable or writable without blocking. | 
        | 47 | 2,542 | 1,971 | scanf | scanf is an implementation of the C function scanf(3). | 
        | 48 | 2,547 | 1,681 | resolv | Thread-aware DNS resolver library in Ruby. | 
        | 49 | 2,756 | 1,900 | resolv-replace | Replace Socket DNS with Resolv. | 
        | 50 | 2,811 | 183 | tsort | Topological sorting using Tarjan's algorithm | 
        | 51 | 2,847 | 1,177 | syslog | Ruby interface for the POSIX system logging facility. | 
        | 52 | 2,952 | 4,781 | did_you_mean | The gem that has been saving people from typos since 2014. | 
        | 53 | 3,248 | 2,678 | rinda | The Linda distributed computing paradigm in Ruby. | 
        | 54 | 3,389 | 2,197 | tempfile | A utility class for managing temporary files. | 
        | 55 | 3,393 | 1,923 | open-uri | An easy-to-use wrapper for Net::HTTP, Net::HTTPS and Net::FTP. | 
        | 56 | 3,619 | 4,988 | td-client | Treasure Data API library for Ruby | 
        | 57 | 3,790 | 4,355 | etc | Provides access to information typically stored in UNIX /etc directory. | 
        | 58 | 4,409 | 3,235 | shellwords | Manipulates strings with word parsing rules of UNIX Bourne shell. | 
        | 59 | 4,982 | 5,634 | td-logger | Treasure Data logging library | 
        | 60 | 5,016 | 7,280 | td | CLI to manage data on Treasure Data, the Hadoop-based cloud data warehousing | 
        | 61 | 5,266 | 5,964 | shell | An idiomatic Ruby interface for common UNIX shell commands. | 
        | 62 | 5,467 | 4,563 | pathname | Representation of the name of a file or directory on the filesystem | 
        | 63 | 5,561 | 3,054 | win32ole | Provides an interface for OLE Automation in Ruby | 
        | 64 | 6,023 | 5,146 | fcntl | Loads constants defined in the OS fcntl.h C header file | 
        | 65 | 6,473 | 7,318 | dbm | Provides a wrapper for the UNIX-style Database Manager Library | 
        | 66 | 6,724 | 5,281 | cmath | CMath is a library that provides trigonometric and transcendental functions for complex... | 
        | 67 | 7,172 | 4,991 | tmpdir | Extends the Dir class to manage the OS temporary file path. | 
        | 68 | 7,707 | 5,993 | find | This module supports top-down traversal of a set of file paths. | 
        | 69 | 7,745 | 6,615 | un | Utilities to replace common UNIX commands | 
        | 70 | 7,847 | 4,871 | weakref | Allows a referenced object to be garbage-collected. | 
        | 71 | 8,406 | 6,381 | io-nonblock | Enables non-blocking mode with IO class | 
        | 72 | 8,851 | 9,862 | gdbm | Ruby extension for GNU dbm. | 
        | 73 | 9,854 | 7,940 | perfectqueue | Highly available distributed cron built on RDBMS | 
        | 74 | 11,248 | 6,582 | sdbm | Provides a simple file-based key-value store with String keys and values. | 
        | 75 | 12,770 | 46,838 | ext_monitor | faster MonitorMixin implementation with C extension which is introduced in Ruby 2.7 | 
        | 76 | 15,054 | 14,765 | fluent-plugin-metricsense | MetricSense - application metrics aggregation plugin for Fluentd | 
        | 77 | 17,302 | 12,808 | perfectsched | Highly available distributed cron built on RDBMS | 
        | 78 | 57,318 | 11,819 | lrama | LALR (1) parser generator written by Ruby | 
        | 79 | 70,099 | 21,518 | traceroute53 | A tool to investigate Route53, ELB, EC2 and Security Groups | 
        | 80 | 155,686 | 70,114 | gohttp | an http library with go. | 
        | 81 | 163,376 | 78,639 | laplace | fast method tracing |