Product: Counting Strings
If you've done the Rapid Software Testing course, then you'll probably be familiar with the Perlclip tool, from James Bach. If not, its a useful tool for generating strings of test text. In particular I find the Perlclip Counter-string function to be pretty useful. Counterstring builds a string that indicates its own length. E.g.: "*3*5*7*10*" The last asterisk is the 10th character.
Thats right - its got bugs, like you don't have to enter a character for the 'mark' or it lets you use numbers for the 'mark'. Older versions did odd things in IE6 etc. There are no doubt many more bugs...