Looking for logging into the Salesforce De site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Salesforce De site. After that you can login as usual with your login credentials.
https://login.salesforce.com/
https://developer.salesforce.com/signup
https://developer.salesforce.com/forums/?id=906F0000000DCY5IAO
https://developer.salesforce.com/auth
https://www.salesforce.org/
https://workbench.developerforce.com/
https://salesforce.stackexchange.com/questions/66525/developer-account-stuck-in-limbo-cant-login
https://www.pardot.com/
https://force.desk.com/customer/en/portal/articles/2871586-how-to-sign-up-for-trailhead-with-a-developer-edition
https://powerofus.force.com/articles/Resource/NPSP-Install
https://force.desk.com/customer/en/portal/articles/2643793-trailhead-profile-signup-login-faq?b_id=13478
https://www.salesforce.org/nonprofit/
https://docs.microsoft.com/en-us/power-bi/service-connect-to-salesforce