I've found the following short programs to be useful, especially when bound to Ctrl-Alt-Shift-O in Notepad so they can pop up in less than a second. Check them out.

One-Liner Utility Programs

I offer a lot of the smaller pieces of software I write under a modified MIT license called the Poetic License. This comes in two forms: the Micropoetic license, which is short enough to insert into just about any code file, and the "amplified" Poetic License, which expands the Micropoetic License in case of a dispute. Check them out.

The Poetic License
MicroPoetic License - Shellscript Version
MicroPoetic License - Java Version

I also use a second licens designed for software that serves other content, like the fiku.py piece of software that runs f@nu fiku. The Printer's License is another modified MIT license designed to make it clear that the open license for the software does not also extend to the content that the software distributes! This also comes in two forms: the Microprinter's license, which is short enough to insert into just about any code file, and the "amplified" Printer's License, which expands the Microprinters License in case of a dispute:

The Poetic License
MicroPoetic License - Shellscript Version
MicroPoetic License - Java Version