Document babashka forks (#1106) [skip ci]

Also removed double nesting of Projects in toc

doc/projects.md

@@ -2,8 +2,11 @@
 
 The following libraries and projects are known to work with babashka.
 
-- [Projects](#projects)
 - [Libraries](#libraries)
+  - [tools.namespace](#toolsnamespace)
+  - [test-runner](#test-runner)
+  - [spec.alpha](#specalpha)
+  - [tools.bbuild](#toolsbbuild)
   - [clj-http-lite](#clj-http-lite)
   - [spartan.spec](#spartanspec)
   - [missing.test.assertions](#missingtestassertions)
@@ -77,11 +80,34 @@ The following libraries and projects are known to work with babashka.
   - [Babashka + scittle guestbook](#babashka--scittle-guestbook)
   - [bb htmx todo app](#bb-htmx-todo-app)
 
-Also keep an eye on the [news](news.md) page for new projects, gists and other
-developments around babashka.
+For more supported libraries, see [this test
+file](test-resources/lib_tests/babashka/run_all_libtests.clj ). Also keep an eye
+on the [news](news.md) page for new projects, gists and other developments
+around babashka.
 
 ## Libraries
 
+### [tools.namespace](https://github.com/babashka/tools.namespace)
+
+A fork of `tools.namespace`. This is used by other libraries and enables them to
+be supported by babashka.
+
+### [test-runner](https://github.com/cognitect-labs/test-runner)
+
+This library works with the
+[tools.namespace](https://github.com/babashka/tools.namespace) fork. See its
+readme for an example task for running tests.
+
+### [spec.alpha](https://github.com/babashka/spec.alpha)
+
+A fork of `clojure.spec.alpha` that includes support for generation and
+instrumentation! Its readme also contains instructions on how to use
+`clojure.core.specs.alpha`.
+
+### [tools.bbuild](https://github.com/babashka/tools.bbuild)
+
+A fork of `tools.build`. 
+
 ### [clj-http-lite](https://github.com/babashka/clj-http-lite)
 
 A fork of a fork of `clj-http-lite`. Example:
@@ -95,7 +121,8 @@ $ bb "(require '[clj-http.lite.client :as client]) (:status (client/get \"https:
 
 ### [spartan.spec](https://github.com/borkdude/spartan.spec/)
 
-An babashka-compatible implementation of `clojure.spec.alpha`.
+An babashka-compatible implementation of `clojure.spec.alpha`. See
+[spec.alpha](#specalpha) for a more complete implementation.
 
 ### [missing.test.assertions](https://github.com/borkdude/missing.test.assertions)