ditaa is a small command-line utility written in Java, that can convert diagrams drawn using ascii art ('drawings' that contain characters that resemble lines like | / - ), into proper bitmap graphics.

Tahoe-LAFS is a Free and Open cloud storage system. It distributes your data across multiple servers. Even if some of the servers fail or are taken over by an attacker, the entire filesystem continues to function correctly, preserving your privacy and security.

Ugarit is a backup/archival system based around content-addressible storage. This allows it to upload incremental backups to a remote server or a local filesystem such as an NFS share or a removable hard disk, yet have the system instantly able to produce a full snapshot on demand rather than needing to download a full snapshot plus all the incrementals since. The content-addressible storage technique means that the incrementals can be applied to a snapshot on various kinds of storage without needing intelligence in the storage itself - so the snapshots can live within Amazon S3 or on a removable hard disk. Similar to Plan 9's venti, but implemented in Chicken Scheme. Encrypting the backup store (called vault) is supported.

Opendedup Develops SDFS, a file-system that does inline deduplication. Requires Java 7 and 2 GB RAM.

Crowdfunding site for Open Source Software projects. Unlike other sites, it is designed to attract contributions from businesses as well as individuals.

DavMail is a POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client (e.g. Thunderbird with Lightning or Apple iCal) with an Exchange server, even from the internet or behind a firewall through Outlook Web Access. DavMail now includes an LDAP gateway to Exchange global address book and user personal contacts to allow recipient address completion in mail compose window and full calendar support with attendees free/busy display.

Encryption tool for data on external media (e.g. USB sticks) for Windows, Mac OS X and Linux.

Another GNSS software receiver, written in C++ and licensed under GPL 3.0.

Windows applications or source code for various numerical algorithms, with emphasis on polynomial root finding. Some algorithms can be used via a web interface.