A daemon that runs on a *nix machine that simulates a network of other systems (of many different operating systems) for the purposes of catching and monitoring intruders.
textfiles.com now offers the contents of entire BBS file and shareware CD-ROMs for download. Some of these are quite famous.
A complete wiki distributed as a single self-modifying HTML file. Dripping with Javascript options and tools. You don't need a web server or a database, just a relatively recent web browser and someplace to store the file. Can be freely shared on a web
A free, open source application that makes manipulating SQLite databases easier. Designed with both people who aren't skilled with databases and administrators in mind.
A bundle of open source cryptographic software for Microsoft Windows with an installer to make it simple to set up. Includes GnuPG, WinPT and GPA (keyring managers), GPGol (a plugin for Outlook 2003), GPGee (a plugin for the Windows Explorer), and a copy of Claws (an e-mail client that uses GnuPG transparently). Also includes handbooks for newbies with crypto.
Determines what version of a web app that it already knows about is run by comparing hashes of certain files with precomputed hashes from known versions. Designed to be low-bandwidth, fast, and automatable. Runs as a stand-alone tool or can be included as a Python module in other software.
A web application written in JavaScript (on top of node.js) that implements a full text editor that allows multiple users to edit text simultanously and confer with one another over a text chat window on one side. Can save the text indefinitely to refer to or work on later as well as export the document in a number of different formats.
FDBG is a code debugger for code running in user mode (ring 3) in long mode (i.e., 64-bit native mode) on AMD CPUs. Ports for Windows and Linux are available. Written entirely in assembly language, includes source code. Extremely small executable.
Kiwix is a utility which lets you archive web pages so that they can be read offline or copied and distributed in the event that there is no connectivity. While it was designed to work with Wikipedia it will actually work with just about any website you throw at it. Cross platform, runs on Windows, Linux, and other OSes. There is even a portable Windows version that doesn't require installation.
Mediainfo is a utility which parses the metadata of media files and tells you the file and/or container format and CODECs used.
The github repository for NuPIC Studio, which is an interactive desktop application for building HTM neuralnetworks, train them, collecting metrics, and exporting them to share. It also allows you to debug and experiment with those neural networks in a desktop environment. Built on top of the Python NuPIC library. Relies upon the Python modules you'd expect. IDE