Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs,…

A streaming JSON parsing and encoding library for Ruby (C bindings to yajl)

gperftools for ruby code

Simple evented I/O for Ruby.

kumofs is a scalable and highly available distributed key-value store.

Health checks upstreams for nginx

Fast sorting of version numbers

New and ultra-turbo-crazy-fast backend for Thin

Instructions for a production installation of Ruby on Rails on Ubuntu 8.04 Hardy Heron

httperf with bigger cookies, so Rails works

‹ᴜɴᴍᴀɪɴᴛᴀɪɴᴇᴅ› A Ruby module for accessing the ncurses library

a daemon which collects system performance statistics periodically and provides mechanisms to store the values in a variety of ways, for example in RRD-files.