I had the need to quickly update the same string within several HTML files. Rather then open each file and do a global search and replace on the string I decided to see if there were any tools on the internet that could speed this process. After a little googling I found a tool called
TextCrawler.
I had a list of over 30 strings to find and replace in 8 different files. I was able to make the changes quickly using this tool.
Text Crawler is freeware, so download it and give it a try.