Ada Programming/Portals

Forges of open-source projects

SourceForge: Currently, there are more than 200 Ada projects hosted at SourceForge — including the example programs for Ada Programming wikibook.
GitHub: A source code repository based on Git with many recent developments.
Codeberg: Codeberg is a democratic community-driven, non-profit software development platform based on Forgejo. It contains a few Ada projects.
Disroot: Disroot is another public Forgejo instance. It also contains a few Ada projects.

Ada-centric sites

There are some Ada-centric forges/catalogues hosted by Ada associations and individuals:

Open Hub (language summary, ada tag, language search): Open Hub is a directory of Open Source projects. Its main features are source code analysis of public repositories and public reviews of projects.

The Public Ada Library (PAL): The PAL is a library of Ada and VHDL software, information, and courseware that contains over 1 BILLION bytes of material (mainly in compressed form). All items in the PAL have been released to the public with unlimited distribution, and, in most cases (the exceptions are shareware), the items are freeware.

Ada and Software Engineering Library Version 2 (ASE2): The ASE2 Library contains over 1.1GB of material on Ada and Software Engineering assembled through a collaboration with over 60 organizations. Walnut Creek CD-ROM once sold copies of this library. Nowadays, it is no longer maintained, but is still hosted in the archive.adaic.com server. It may contain useful resources, but it is highly redundant with other libraries.