GroupOffice is a groupware suite that takes your office online, implementing online collaboration and CRM. It allows you to share projects, calendars, files and email online with co-workers and clients. It is easy to use and fully customizable. It also features synchronization with PDAs and Outlook.
aria2 is a utility for downloading files. The supported protocols are HTTP(S), FTP, BitTorrent, and Metalink. It has a powerful segmented downloading ability, downloading a file from multiple sources and multiple protocols and utilizing your download bandwidth to the maximum. It supports downloading a file from HTTP(S)/FTP and BitTorrent at the same time, while the data downloaded from HTTP(S)/FTP is uploaded to the BitTorrent swarm. Using Metalink's chunk checksums, aria2 automatically validates chunks of data while downloading a file like BitTorrent.
gPodder is a Podcast receiver/catcher written in Python and pyGTK. It manages podcast feeds for you, and automatically downloads all podcasts from as many feeds as you like. If you are interested in Podcast feeds, simply put the feed URLs into gPodder and it will download all episodes for you automatically. If there is a new episode, it will get it for you. It supports download resume, if the server supports it.
yaDMS (yet another Document Management System) is a PHP-based document management system, with many features like a clipboard, conversion of mail to DMS, conversion from DMS to mail, zip & download, copy, move, multiuser, and full-text searching with support for various document formats.
VerliHub is a Direct Connect server (HUB) for Linux. It features banlists for IP addresses, nicks, and hosts, temporary or permanent bans, the ability to register users for a hierarchy of 2 non-op and 4 opertor levels, MySQL data storage, and the ability to change some settings at runtime. It consumes minimal CPU resources and quite moderate RAM resources. Users that are registered for a VerliHub server gain a few advantages. For example, the user won't be affected by an IP address ban that was set against another user who shares the same IP address.