SSH's (secure shell) most common authentication mode is called "interactive keyboard password authentication", so called both because it is typically done via keyboard, and because openssh takes active measures to make sure that the password is, indeed, typed interactively by the keyboard. Sometimes, however, it is necessary to fool ssh into accepting an interactive password non-interactively. This is where sshpass comes in.

The APCu is userland caching: APC (Alternative PHP Cache) stripped of opcode caching after the deployment of Zend OpCache in PHP 5.5 as the primary solution to opcode caching in future versions of PHP.

The Linux Memory Game is an X11 game for children ages 3 and up, based on the card game "Memory". It is written using GTK+ library. Although it is a children's game, it has five skill levels, the higher ones are challenging to adults as well. It features the ability to add your own 64x64 pixmap images.

LLVM is a collection of libraries and tools that make it easy to build compilers, optimizers, just-in-time code generators, and many other compiler-related programs.

F3 (Fight Flash Fraud or Fight Fake Flash) tests the full capacity of a flash card (flash drive, flash disk, pendrive).