Glubs is a clubbing system similar to Yahoo! or MSN Groups. Users browse through a category-hierarchy and create clubs to share news, files, pics, links and a calendar with friends. Some of the core features are multi-language and -timezone support, and custom HTML templates/skins.
The GlynnTucker.Cache assembly provides a data structure for caching slow data retrievals. For example, it can cache data retrieved from a database server over the network. Think of it as a Hashtable that can automatically expire its data after a set amount of time or a specified period of inactivity, on a per-object basis. It is written in C# and it should work with any .NET language.
gmailbox allows offline browsing of a gmail folder with your favorite email client. It includes one script that retrieves the folder and stores it in an mbox file, and another script that implements a POP3 server that can be accessed by an email client to download the messages for offline use.
Gnosis Utils contains several Python modules for XML processing, plus other generally useful tools: xml.pickle (serializes objects to/from XML, API compatible with the standard pickle module), xml.objectify (turns arbitrary XML documents into Python objects), xml.validity (enforces XML validity constraints via DTD or Schema), xml.indexer (full text indexing/searching), and many more.
GnuDIP is a application designed to allow an ISP to publish a DNS hostname for a customer without having to assign a static IP address. Customers can maintain the address information via a CGI on the ISP's website. For those who are familiar with the dyn.ml.org part this is a simple replacement package.