Password generator bookmarklet. Can set length (default's 20) and whether to include special characters, per use. Option to regen if not happy with output. Ideal for use with password managers.

generate new password bookmarklet.js

javascript:(function(){var%20c=['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','0','1','2','3','4','5','6','7','8','9'],l=prompt('Password%20length?',20),p;if(!l)return;if(isNaN(l=parseInt(l))||l<1){alert('Invalid%20length');return}if(confirm('Special%20characters?'))Array.prototype.push.apply(c,['!','@','#','$','%','^','&','*','(',')','-','_','=','+','[','{',']','}','\\','|',';',':',"'",'"',',','<','.','>','/','?','`','~']);do{p='';while(p.length<l)p+=c[Math.floor(Math.random()*c.length)]}while(prompt('Copy%20and%20OK,%20or%20cancel%20for%20new%20one',p)==null)})();