If you are thinking about running a game of Call of Cthulhu, and would be interested in a free tool to help you manage the characters and your game's timeline, then you need to check this out.
First - Go download a free tool called The Keep. You can find it at: http://thekeep.peppermill-marketing.com/. If you are on a Mac or Linux system, you will most likely need to use the manual instructions to open and load the program onto your system. It is a Java based tool. Once that's done, you now have the basic tool.
Second - You can now use a free online tool to generate Call of Cthulhu character sheets that can then be downloaded and put into your The Keep tool. You can find the online character generation tool at: http://thekeep.peppermill-marketing.com/sheets.php.
These two tools are easy to use and a boon to any Cthulhu Keeper.
I also want to tip my hat to the creator of these tools, Allicorn.
Check out his other Cthulhu related site The Book of Alternative Dead Names. A Cthulhu Keeper can find all kinds of helpful names for monsters, gods, and spells in order to add an air of mystery to your CoC game. You can also find links to original music created by Allicorn that are perfect for any CoC game too.