X-Git-Url: http://nitlanguage.org

diff --git a/README.md b/README.md
index d84731a..ddd682a 100644
--- a/README.md
+++ b/README.md
@@ -18,21 +18,20 @@ Requirements:
  * gcc		http://gcc.gnu.org/ (or a compatible C compiler)
  * pkg-config	http://www.freedesktop.org/wiki/Software/pkg-config/
  * ccache	http://ccache.samba.org/	to improve recompilation
- * libgc-dev	http://www.hpl.hp.com/personal/Hans_Boehm/gc/
- * graphviz	http://www.graphviz.org/	to enable graphs with the nitdoc tool
+ * libgc-dev	http://hboehm.info/gc/
  * libunwind	http://nongnu.org/libunwind
 
 Those are available in most Linux distributions
 
-    $ sudo apt-get install build-essential ccache libgc-dev graphviz libunwind-dev pkg-config
+    $ sudo apt-get install build-essential ccache libgc-dev libunwind-dev pkg-config
 
 and on OS X using brew
 
-    $ brew install ccache bdw-gc graphviz libunwind-headers pkgconfig
+    $ brew install ccache bdw-gc libunwind-headers pkgconfig
 
 or with MacPorts
 
-    $ sudo port install ccache boehmgc graphviz libunwind-headers pkgconfig
+    $ sudo port install ccache boehmgc libunwind-headers pkgconfig
 
 Important files and directories:
 
@@ -46,7 +45,7 @@ Important files and directories:
  * lib/		Nit standard library
  * LICENCE	License of the software
  * Makefile	Bootstrap the Nit tools
- * misc/	Some additional files for commons text editors and tools
+ * misc/	Some additional files for common text editors and tools
  * NOTICE.md	List of the authors
  * README	This file
  * share/	Common resources used by tools
@@ -66,6 +65,25 @@ To have your environment automatically configured at login, just source it with
     $ . misc/nit_env.sh install
 
 
+More tools:
+
+Additional tools can also be compiled but require more dependencies.
+
+ * graphviz	http://www.graphviz.org/	to enable graphs with the nitdoc tool
+ * libcurl      https://curl.haxx.se/libcurl/   for the nit package manager nitpm
+ * libevent	https://libevent.org/           for the nit documentation server nitweb
+ * libmongoc    http://mongoc.org/              also for nitweb
+
+    $ sudo apt-get install graphviz libcurl4-openssl-dev libevent-dev libmongoc-dev
+    $ make more
+
+
+Contributing:
+
+To contribute to Nit, please see [CONTRIBUTING](CONTRIBUTING.md).
+
+The best way to ask the team for advice, submit bugs or request features, is through the use of Github issues, using the appropriate tag (`forum`, `feature-request`, `bug`).
+
 Information, contacts and help:
 
 * Website <http://www.nitlanguage.org>