Xapian is a search engine library, scalable to collections containing hundreds of millions of documents. It's written in C++ with bindings for Perl, Python, PHP, Java, Tcl, C#, Ruby, and Lua. It is a highly adaptable toolkit that allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also a rich set of boolean query operators. Omega is a Web search application built upon the Xapian library. It can index a Web server's document tree (including HTML, PDF, OpenOffice, MS Word/Excel/Powerpoint/Works, WordPerfect, RTF, PS, etc.), or data exported from arbitrary sources (e.g. SQL databases).
LiteSpeed Web Server is a high-performance, secure, easy-to-use, and Apache interchangeable Web server. It supports HTTP/1.1, SSL, CGI, FastCGI, LSAPI, PHP, JSP, Servlets, GZIP compression, chroot, IP level throttling, connection accounting, DoS attack prevention, and instant recovery mechanisms. With its Apache compatible rewrite engine, .htaccess, and MS FrontPage support, migration is quick and easy. A Web interface is included for administration and configuration. It can be used as a content accelerator, compression proxy, or a security guard running in front of any Web and application server.
Alexandria is a GNOME application to help manage a book collection. It retrieves book information (including cover pictures) from several online libraries, allows you to search for a book (either by EAN/ISBN, title, authors, or keyword), can import and export data into ONIX, Tellico, and EAN/ISBN-list formats, generates Web pages from your libraries, allows marking your books as loaned, saves data using the YAML format, features an HIG-compliant user interface, shows books in different views that can be filtered or sorted, and handles book rating and notes.
Kazehakase is a Web browser which aims to provide a user interface that is truly user-friendly and fully customizable. It supports tabbed browsing, a "remote bookmark" feature (through RSS) in a menu or sidebar, a variable UI to adapt to the user's skill level, and customizable mouse gestures and key accelerators.
A 'honeypot' is designed to detect server-side attacks. In contrast, a 'honeyclient' is designed to detect client-side attacks. Specifically, a honeyclient is a dedicated host that drives specially instrumented applications to access remote servers to see if those servers are behaving in a malicious manner (by compromising the client). Honeyclients can proactively detect exploits against client applications without known signatures. This framework uses a client-server model with SOAP messaging as the primary communication method, and uses the free version of VMware Server as a means of virtualizing the client environment.
netstiff (formerly known as webdiff) is a powerful Web and FTP site update checker. It supports a variety of different methods (diff, HTML, size, date, MD5 sum, regexp) to check for updates. There are also sophisticated settings to make it useful for partly dynamic Web pages. Without any given arguments, netstiff will either run its interactive configuration tool or check your sites for updates and print the changes in a diff(1)-like manner.