agentsmith is a daemon that continuously monitors a log file for break-in attempts by remote hosts. Upon detection of a break-in attempt, it launches a user defined script or application, which can do virtually anything from sending mail messages to whatever else you might think of. The criteria for what is considered a break-in attempt can be configured by means of a regular expression.
Crules is a dynamic programming language that takes influences from Python, Perl, and Haskell. The main motivation for this language was the concept or design of a new paradigm or feature called "rules". A rule is a potential entry point which has dependencies rather than parameters. Any rule can be overridden to have different or no dependencies. Since the language itself can decide on the best course of actions for an operation, dependencies become preconditions for execution. It also features lazy evaluation, object orientation, variadic and anonymous-parameter functions, and reflection. These features help make the language truly dynamic.
Moose File System (MooseFS / MFS) is a fault tolerant, network distributed file system. It spreads data over several physical servers, which are visible to the user as one resource. For standard file operations MooseFS mounted with FUSE acts like other Unix-alike file systems: it has a hierarchical structure; it stores POSIX file attributes; and it supports special files, symbolic links, and hard links. Access to the file system can be limited based on IP address and/or password. It offers high reliability, since several copies of the data can be stored across separate computers. Capacity is dynamically expandable by attaching new computers or disks. Deleted files are retained for a configurable period of time (with a file system level "trash bin"). MooseFS supports coherent snapshots of files, even while the file is being written or accessed.