Juta's Weekly Statutes Bulletin is available on open access. It is based on both National and provincial Gazettes published during the week. It lists national and provincial legislation proclamations and notices. While their are no links to the full text Gazettes, it is a good way to be alerted to legislative developments, particularly for the provinces, which typically have incomplete and out of date lists of legislation on their legislatures' websites. The Bulletins can be downloaded as PDFs. You can sign up to have the Bulletins emailed to you.
All national and provincial Government Gazettes are available on Green Gazette website - this is a subscription site to which we do not subscribe. Individual jurisdictions can be subscribed to. You can receive free weekly email alerts for single or all jurisdictions, but require a subscription to access the full text gazettes.