To sign in or login to your existing Gliffy Online account, go to https://www.gliffy.com/ and click the Log In box in the upper right corner.
Enter your email and password and click "Log In".
If you have a Facebook, G+ or MS Live account already linked up you can login using these by clicking the applicable OAuth icon from the Log In area.
If you do NOT already have an account linked up to Facebook, G+ or MS Live and click the icons, it will create a new account for you under the email tied to them.
If you are unable to login to your account, please follow the reset password instructions here.
If you have further questions or difficulties accessing your account, please contact firstname.lastname@example.org.