memtester is a user-space utility for testing the memory subsystem in a computer to determine if it is faulty. It does a good job of finding intermittent faults and non-deterministic faults. It has many tests to help catch borderline memory. memtester should compile and run on any 32- or 64-bit Unix or Unix-like system.
Sysload SP Analyst offers powerful means to control and analyze server performance. It provides real-time, continuous, fine-grained resource monitoring across Windows, Solaris, AIX, HP/UX, Linux, I-series, Citrix, Netware, and virtual machines (VMware Vi, IBM LPARs, Solaris X, I5 OS LPARs). It also provides incident and failure risk prediction and immediate analysis of the root cause of problems, allowing you to pinpoint the application(s) or user(s) responsible for server load increases.
SystemRescueCd is a Linux system available from a bootable CDROM that provides an easy way to perform administrative tasks on your computer, such as creating and editing the partitions of the hard disk or backing up data. It contains a lot of system utilities (such as parted, partimage, and fstools), and basic programs (such as editors, midnight commander, and network tools). It also includes GParted, a Partition Magic clone that makes editing partitions easy with its graphical user interface. This CDROM aims to be very easy to use and accessible to everybody, and it also provides advanced personalization features.
Ultimate Boot CD is a collection of Freeware and Free Software tools for PC diagnostics and maintenance. Included are tools for BIOS editing, CPU and memory testing, boot management, data recovery, peripheral and system inventory, and hard drive partitioning, cloning, wiping, diagnostics, and low-level editing. All tools boot and run from the CD.
FTPL (FakeTime Preload Library, aka libfaketime) intercepts various system library calls and tricks programs of your choice into seeing a faked system time without having to change the time system-wide. This can be used for running legacy software with Y2K bugs, testing software for year-2038 compliance, debugging time-related issues such as expired SSL certificates, and using software that ceases to run outside a certain time frame. The faked time can be specified either absolutely or relative to the real current time, and optionally also affects file timestamps. The faked clock continues to run, but can optionally be frozen, slowed down, or made faster. A wrapper script "faketime" simplifies the usage, similar to tools such as fakechroot.
Log watcher is a PHP class that polls log files and takes newly added lines to send them to a given watcher email address. Although this class can be used to poll any type of log files, it was developed with the intention to overcome a limitation of the PHP error trapping system that is not able to capture certain types of errors during script execution, like script parsing errors or form file uploading failures. It is meant to be used from cron-like task schedulers to poll log files regularly. The email notification message can be composed from text templates. The message delivery function can be replaced by custom functions like the urgent mail function that can be faster for delivering critical messages.