Molsketch is a 2D molecular editing tool. Its goal is to help you draw molecules quick and easily. Of course you're creation can be exported afterwards in high quality in a number of vector and bitmap formats.
Periodic Table of Elements is a quick reference tool that allows you a quick glance to get general information about an element. The program is for educational purposes.
IndelExtractor is a GUI and command-line application written in Perl that generates various molecular sequence alignment masks, including one to make identification and removal of Indels and their surrounding ambiguous alignment quick and simple.