Looking for logging into the Developer Salesforce Sign Up 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 Developer Salesforce Sign Up site. After that you can login as usual with your login credentials.
https://developer.salesforce.com/signup
https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/quickstart_dev_org.htm
https://developer.salesforce.com/
https://developer.salesforce.com/docs/atlas.en-us.externalidentityImplGuide.meta/externalidentityImplGuide/external_identity_create_developer_org.htm
https://developer.salesforce.com/forums/?id=9060G000000Bfn6QAC
https://developer.salesforce.com/auth
https://help.salesforce.com/articleView?id=overview_edition.htm&type=5
https://developer.salesforce.com/forums?dc=Apex_Code_Development
https://developer.salesforce.com/blogs
https://developer.salesforce.com/promotions/orgs/analytics-de
https://trailhead.salesforce.com/credentials/developeroverview
https://developer.salesforce.com/docs/atlas.en-us.api_asynch.meta/api_asynch/asynch_api_quickstart_set_up_org.htm
https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_intro_get_dev_account.htm