Trouble Ticket System is a simple system that helps people help their clients with solving problems. You can specify problem categories, discuss the problems, and report your solutions for similar problems in the future. Clients are able to get a ticket and watch the activity of their case. It is ideal for people who want a small and lightweight system without other groupware.
Yada Yada Yada Wiki is a small wiki that lives in one self-modifying PHP5 file. It doesn't make use of JavaScript or databases, and works with all browsers. Example uses include planning a trip with your friends or setting up a project site without effort. It is inspired by the "Wiki on a Stick" project.