AIDE (Advanced Intrusion Detection Environment) is a file and directory integrity checker. It creates a database from the regular expression rules that it finds from the config file. Once this database is initialized it can be used to verify the integrity of the files. Several message digest algorithms are used. All of the usual file attributes can also be checked for inconsistencies.
asapm is an AfterStep look & feel Advanced Power Management (APM) monitor for laptop and notebook PCs running Linux or FreeBSD/NetBSD/OpenBSD and X Windows. It displays charge left in the battery, the time left to the total discharge of the battery, computer is connected to the mains or is working on a battery and the battery status high/low/critical.
Automatos provides tools for automated performance analysis, capacity planning, and real-time monitoring of services across multiple platforms (Linux, NT/2000/XP, AIX, Solaris, Tru64, and HP-UX). The performance analysis service assists in identification or prevention of problems with computers within a company's network. The capacity wizard provides hardware upgrade planning support, suggestions being based on current (or simulated) growth rate. Real-time monitoring allows users to remotely monitor their machines from either a Web or a WAP console, generating notifications based on user-defined thresholds. Automatos is a low-intrusion system that uses strong encryption and compresses data for optimal and minimum bandwidth usage. Reports are generated in PDF format in several different languages. Ad-hoc online report generation and customization is also available.
autostatus is yet another network monitoring program. It was designed to be easy to use and configure, fast and efficient. The 'fast' and 'efficient' part is handled by making autostatus aware of network hierarchies, and avoiding checking a host or service when another host/service/link upon which it is dependent is unavailable. It exploits maximum parallelism during its checking to speed up monitoring.
changetrack is a program to monitor changes to files. If files are modified one day, and the machine starts working incorrectly some days later, changetrack can provide information on which files were modified, and help locate the problem. Changetrack will also allow recovery of the files from any stage.
Checkservice is a Perl script that monitors services on remote hosts. It uses plugins to provide a more thorough check than just a socket check, and can be configured to check multiple services on multiple hosts using two different methods (simple and extended). It is able to write logs and when running in the background enables warnings. It features a beep-, mail-, and SMS-warning system.
Cricket is a high performance, flexible system for monitoring trends in time-series data. It was developed to help network managers visualize and understand the traffic on their networks, but it can be used for all kinds of other jobs, as well. It features a hierarchical configuration system (which avoids duplicate info in the config files), full flexibility in RRD structure (arbitrary numbers of DS's and RRA's), a CGI-based graph-on-demand application, and SNMP- and EXEC-based data gathering.