REXML is an XML 1.0 compliant, reasonably fast, non-validating XML parser. It has an API that is designed to be intuitive, straightforward. and terse. REXML includes a tree model parser, a SAX2 streaming parser, and a pull parser. It also includes a full XPath implementation. All of REXML's parsers pass 100% of the Oasis XML non-validating tests. As of Ruby 1.8.0, REXML is distributed with Ruby.
Canorus is a cross-platform music score editor. It supports an unlimited number and length of staffs, polyphony, MIDI playback of written notes, chord markings, lyrics, and a number of import and export filters to many formats like MIDI, MusicXML, ABC Music, MUP, PMX, MusiXTeX, and LilyPond. It features multiple viewports of the same score, scripting support, score source view, and a fast and intuitive UI. It is based on Qt4, uses CMake as a project management tool, swig for scripting/macros integration (primary script languages are Ruby and Python), and the cross platform rtmidi library for MIDI playback. It is the official successor to NoteEdit.
Netomata Config Generator (NCG) creates complete, ready-to-install configuration files for network devices and services from a common lightweight model of a network. Because these configuration files are generated programmatically and generated from a shared model, they are more likely to be consistent and complete, making a network more reliable, easier to troubleshoot, and easier to expand in both size and functionality. The inputs to NCG are a model describing the network and templates for the configuration files of the various devices (routers, switches, load balancers, firewalls, etc.) and services (SNMP, DNS, DHCP, etc.). From these inputs, NCG produces complete, consistent, ready-to-install configuration files for those devices and services.
Noosfero is a Web platform for social networks. Besides the regular social network features (such as friends and communities), Noosfero offers a full-featured CMS, making every user or community profile a complete Web site with several types of content (including text, image gallery, and file uploads), RSS feeds, agenda, the possibility to set custom themes, and other features. It is also possible to run several independent social networks within the same Noosfero installation.
Hitchhiker's Guide to the Internet is a German introduction to the technical aspects of the Internet. This book explains both the low-level protocols IP, ICMP, TCP, and UDP and the high-level protocols SMTP, POP3, IMAP4, NNTP, HTTP, Gopher, FTP, IRC, DICT, Finger, Daytime, DNS, and Whois.