Knigodej gem is a tool to make a PDF, and DJVU books from the XCF (GIMP image) source

Easily crop images in Ruby on Rails with Cropper.js integration

The Faxage API can be used to send and receive faxes, gather sent fax images and transmittal pages, provision DIDs, enable and disable (busy out) DIDs, access CDRs, get realtime status, can be polled or can push sent and received fax notifications, check local number portability, manage users, re...

InplaceEditing is a jQuery and Best In Place script and a Rails helper that provides methods (string_editor, image_editor, text_editor, element_editor, optional_editor, only_valid_editor) to allow editing any ActiveRecord object's property (since it uses standard BestInPlace form).

Uses computer vision to cut objects from images.

Generate PNG images from Latex formules on your ruby projects

Conversor de documentos Latex em imagens, via shell script

Extract images, favicons, and meta info from websites

Extension for AttachmentFu (http://github.com/technoweenie/attachment_fu) which uses the Google App Engine for storage and image resizing.

Lash will bundle and compress most common static assets using Googles closure compiler for JavaScript, SASS for CSS and will package loose image files into a single static CSS sprite.

Slice deep-zoom images.

Gem for creating an image from OSM of an area

The VISOR Meta System, responsible for maintaining image metadata.

A captcha that uses images instead of garbled text

Given a URL, retrieves thumbnail images (similar to when you share a link on Facebook or Digg).

A Lita handler that lets the user specify custom meme images

List pngs or jpgs which are bigger than they need to be. Can optionally compress them, but is designed mainly to keep an eye on a tree of images to make sure they stay in good shape.

A Lita handler for fetching images from http://bukk.it

This plugin just display a funny devops image with a title as seen on http://devopsreactions.tumblr.com/

Get color variations from an image. Original is 'http://jariz.github.io/vibrant.js'