Getting rid of programs on my C drive,Win 98SE

Does anyone know of a program that will sort my main folders/directories into ascending/descending size and, also if possible, last access date. I would like to review what is on my PC and delete downloads that I have not used in months/years. Downloads that I have installed and run only once and decided that they are not for me and forgot to delete, etc. There is plenty of room on my C drive but backup size is getting bigger and taking longer.
I will do a complete backup before I start, of course.

Using WIN98SE Baz

 

I like TreeSize as well. Installs into the right-click context menu of Explorer, very handy little utility.

 

Thanks star17 and alanc. Isn'the net and MG wondeful. A reply within 9 minutes from the other side of the world at 7.16 in the morning (Monday), local time in OZ. Have downloaded it and about to install. Thx again Baz
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I went to install TreeSize yesterday only to find I already had an earlier version installed about a year ago. Guess it proves the point why I need such a program. Oh well, better keep on taking the tablets.

TreeSize looks like what I need though, thanks Baz