TIFF to PDF is a program which does exactly what its name suggests, quickly converting multi-page TIFF images to PDFs.
The bare-bones interfaces means there's not too much to learn. At a minimum, all you have to do is click "Browse", choose your TIFF file; click "Convert", specify a PDF name; and your document will be created in a second or two.
There are also a few basic TIFF view controls - you can zoom in and out, or browse to different pages - but that's about it.
There's obviously considerable room for improvement here. And we would start with the interface. The TIFF viewer clearly needs to be resizeable, and we'd also replace the colour scheme. The current purple look is very low contrast, and some people are going to find it hard to see clearly.
In terms of functionality, we'd also like to be able to choose exactly which TIFF pages get saved to PDF. And the ability to convert multiple TIFF files in a single operation would be useful, too.
If you only want to run the occasional conversion, though, TIFF to PDF will do the job perfectly well. Give it a try.