First go at a very very simple example project

.gitattributes

@@ -1,2 +1,6 @@
 *.c eol=lf
-*.cpp eol=lf
+*.cpp eol=lf
+*.gd eol=lf
+*.tscn eol=lf
+*.cfg eol=lf
+*.godot eol=lf

.gitignore

@@ -2,4 +2,5 @@
 *.os
 *.so
 *.dylib
-.import
+.import
+*.import

c/SimpleDemo/README.md

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+# Simple example using C
+
+This is a small example using C to create a GDNative script that just showcases some very simple bare bones calls
+
+## Compiling
+
+Dependencies:
+ * You need to have the [Godot headers](https://github.com/GodotNativeTools/godot_headers) saved somewhere on your system
+ * clang or any decent C compiler that's C11 or C99 compatible
+
+To compile the library, do
+
+  cd src
+  clang -std=c11 -fPIC -c -I/PATH/TO/GODOT/HEADERS simple.c -o simple.os
+  clang -shared simple.os -o libsimple.so
+
+This creates the file `libsimple.so` in your `src` directory.
+For windows you need to find out what compiler flags need to be used, I don't know which ones. (If you do, feel free to fork and update this project and README)
+
+On mac:
+
+  cd src
+  clang -std=c11 -fPIC -c -I/PATH/TO/GODOT/HEADERS simple.c -o simple.os -arch i386 -arch x86_64
+  clang -dynamiclib simple.os -o libsimple.dylib -arch i386 -arch x86_64 -framework Cocoa -framework IOKit -framework CoreVideo -Wl,-undefined,dynamic_lookup
+
+This creates the file 'libsimple.dylib' as a universal binary (or alternatively remove one of the -arch options from both commands if you want to just compile for one architecture).
+
+## Usage
+
+Create a new object using `load("res://SIMPLE.gdn").new()`
+
+This object has following methods you can use:
+ * `get_data()`
+

c/SimpleDemo/SIMPLE.gdn

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+[gd_resource type="GDNativeScript" load_steps=2 format=2]
+
+[sub_resource type="GDNativeLibrary" id=1]
+
+platform/unix = ""
+platform/x11 = "res://src/libsimple.so"
+platform/server = ""
+platform/android = ""
+platform/blackberry = ""
+platform/haiku = ""
+platform/mac = "res://src/libsimple.dylib"
+platform/ios = ""
+platform/osx = "res://src/libsimple.dylib"
+platform/html5 = ""
+platform/windows = ""
+platform/uwp = ""
+
+[resource]
+
+library = SubResource( 1 )
+script_name = "SIMPLE"
+

c/SimpleDemo/default_env.tres

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+[gd_resource type="Environment" load_steps=2 format=2]
+
+[sub_resource type="ProceduralSky" id=1]
+
+radiance_size = 1
+sky_top_color = Color( 0.301961, 0.403922, 0.909804, 1 )
+sky_horizon_color = Color( 0.556863, 0.823529, 0.909804, 1 )
+sky_curve = 0.25
+sky_energy = 1.0
+ground_bottom_color = Color( 0.196078, 0.152941, 0.0980392, 1 )
+ground_horizon_color = Color( 0.329412, 0.211765, 0.0627451, 1 )
+ground_curve = 0.25
+ground_energy = 1.0
+sun_color = Color( 1, 1, 1, 1 )
+sun_latitude = 35.0
+sun_longitude = 0.0
+sun_angle_min = 1.0
+sun_angle_max = 100.0
+sun_curve = 0.05
+sun_energy = 16.0
+texture_size = 0
+
+[resource]
+
+background_mode = 2
+background_sky = SubResource( 1 )
+background_sky_scale = 1.0
+background_color = Color( 0, 0, 0, 1 )
+background_energy = 1.0
+background_canvas_max_layer = 0
+ambient_light_color = Color( 0, 0, 0, 1 )
+ambient_light_energy = 1.0
+ambient_light_sky_contribution = 0.0
+fog_enabled = false
+fog_color = Color( 0.5, 0.6, 0.7, 1 )
+fog_sun_color = Color( 1, 0.9, 0.7, 1 )
+fog_sun_amount = 0.0
+fog_depth_enabled = true
+fog_depth_begin = 10.0
+fog_depth_curve = 1.0
+fog_transmit_enabled = false
+fog_transmit_curve = 1.0
+fog_height_enabled = false
+fog_height_min = 0.0
+fog_height_max = 100.0
+fog_height_curve = 1.0
+tonemap_mode = 0
+tonemap_exposure = 1.0
+tonemap_white = 1.0
+auto_exposure_enabled = false
+auto_exposure_scale = 0.4
+auto_exposure_min_luma = 0.05
+auto_exposure_max_luma = 8.0
+auto_exposure_speed = 0.5
+ss_reflections_enabled = false
+ss_reflections_max_steps = 64
+ss_reflections_fade_in = 0.15
+ss_reflections_fade_out = 2.0
+ss_reflections_depth_tolerance = 0.2
+ss_reflections_roughness = true
+ssao_enabled = false
+ssao_radius = 1.0
+ssao_intensity = 1.0
+ssao_radius2 = 0.0
+ssao_intensity2 = 1.0
+ssao_bias = 0.01
+ssao_light_affect = 0.0
+ssao_color = Color( 0, 0, 0, 1 )
+ssao_blur = true
+dof_blur_far_enabled = false
+dof_blur_far_distance = 10.0
+dof_blur_far_transition = 5.0
+dof_blur_far_amount = 0.1
+dof_blur_far_quality = 1
+dof_blur_near_enabled = false
+dof_blur_near_distance = 2.0
+dof_blur_near_transition = 1.0
+dof_blur_near_amount = 0.1
+dof_blur_near_quality = 1
+glow_enabled = false
+glow_levels/1 = false
+glow_levels/2 = false
+glow_levels/3 = true
+glow_levels/4 = false
+glow_levels/5 = true
+glow_levels/6 = false
+glow_levels/7 = false
+glow_intensity = 0.8
+glow_strength = 1.0
+glow_bloom = 0.0
+glow_blend_mode = 2
+glow_hdr_treshold = 1.0
+glow_hdr_scale = 2.0
+glow_bicubic_upscale = false
+adjustment_enabled = false
+adjustment_brightness = 1.0
+adjustment_contrast = 1.0
+adjustment_saturation = 1.0
+

c/SimpleDemo/main.gd

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+extends Control
+
+# load the SIMPLE library
+onready var data = preload("res://SIMPLE.gdn").new()
+
+func _ready():
+	# Called every time the node is added to the scene.
+	# Initialization here
+	pass
+
+
+func _on_Button_pressed():
+	get_node("Label").set_text("Data = " + data.get_data())

c/SimpleDemo/main.tscn

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+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://main.gd" type="Script" id=1]
+
+[node name="main" type="Control"]
+
+anchor_right = 1
+anchor_bottom = 1
+rect_clip_content = false
+mouse_filter = 0
+script = ExtResource( 1 )
+
+[node name="Button" type="Button" parent="."]
+
+margin_left = 384.0
+margin_top = 233.0
+margin_right = 630.0
+margin_bottom = 289.0
+rect_clip_content = false
+mouse_filter = 0
+toggle_mode = false
+enabled_focus_mode = 2
+shortcut = null
+group = null
+text = "Hello"
+flat = false
+
+[node name="Label" type="Label" parent="."]
+
+margin_left = 392.0
+margin_top = 311.0
+margin_right = 629.0
+margin_bottom = 368.0
+rect_clip_content = false
+mouse_filter = 2
+size_flags_vertical = 0
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
+[connection signal="pressed" from="Button" to="." method="_on_Button_pressed"]
+
+

c/SimpleDemo/project.godot

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+config_version=3
+[application]
+
+name="SimpleDemo"
+main_scene="res://main.tscn"
+icon="res://icon.png"
+
+[memory]
+
+multithread/thread_rid_pool_prealloc=60
+
+[rendering]
+
+viewport/default_environment="res://default_env.tres"

c/SimpleDemo/src/simple.c

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+#include <godot.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct user_data_struct {
+	char data[256];
+} user_data_struct;
+
+void *simple_constructor(godot_object *instance, void *method_data);
+void simple_destructor(godot_object *instance, void *method_data, user_data_struct *user_data);
+godot_variant simple_get_data(godot_object *instance, void *method_data, user_data_struct *user_data, int num_args, godot_variant **args);
+
+void godot_native_init(godot_native_init_options *options) {
+
+	godot_instance_create_func create = {};
+	create.create_func = &simple_constructor;
+
+	godot_instance_destroy_func destroy = {};
+	destroy.destroy_func = &simple_destructor;
+
+	godot_script_register_class("SIMPLE", "Reference", create, destroy);
+
+	{
+		godot_instance_method get_data = {};
+		get_data.method = &simple_get_data;
+
+		godot_method_attributes attributes = {};
+		attributes.rpc_type = GODOT_METHOD_RPC_MODE_DISABLED;
+
+		godot_script_register_method("SIMPLE", "get_data", attributes, get_data);
+	}
+
+}
+
+void *simple_constructor(godot_object *instance, void *method_data) {
+	printf("SIMPLE._init()\n");
+	
+	user_data_struct *user_data = godot_alloc(sizeof(user_data_struct));
+	strcpy(user_data->data, "World");
+
+	return user_data;
+}
+
+void simple_destructor(godot_object *instance, void *method_data, user_data_struct *user_data) {
+	printf("SIMPLE._byebye()\n");
+
+	godot_free(user_data);
+}
+
+godot_variant simple_get_data(godot_object *instance, void *method_data, user_data_struct *user_data, int num_args, godot_variant **args) {
+	godot_string data;
+	godot_variant ret;
+
+	godot_string_new_data(&data, user_data->data, strlen(user_data->data));
+	godot_variant_new_string(&ret, &data);
+
+	return ret;
+}