HAC (HAC Ada Compiler) is a quick, small, open-source Ada compiler, covering a subset of the Ada language. HAC is itself fully programmed in Ada.
Web site: http://hacadacompiler.sf.net/
From there, links to sources and an executable for Windows.
* Main improvements since v.0.0996:
- packages and subpackages are now supported
- modularity: packages, procedures and functions can be standalone library units, stored in individual files with GNAT's naming convention, and accessed from other units via the WITH clause
- validity checks were added for a better detection of uninitialized variables.
Package examples and modularity tests have been added. Particularly, a new PDF producer package with a few demos is located in the ./exm/pdf directory.
PS: for Windows, there is an integrated editor that embeds HAC:
PPS: HAC will be shown at the Ada-Europe conference (presentation + tutorial)