Seen in the wild but not in the GL/GLES registries: GL_AMDX_abuffer_oit GL_AMDX_debug_output GL_AMDX_name_gen_delete GL_AMDX_random_access_target GL_AMDX_texture_compression_dxt6 GL_AMDX_texture_compression_dxt7 GL_AMDX_vertex_shader_tessellator GL_AMD_shader_trace GL_AMD_texture_compression_dxt6 GL_AMD_texture_compression_dxt7 GL_AMD_texture_cube_map_array GL_APPLE_flush_render GL_APPLE_packed_pixels GL_APPLE_pixel_buffer GL_APPLE_vertex_point_size GL_ARB_imaging GL_ARB_shading_language_120 GL_ARB_texture_snorm GL_ATIX_texture_env_combine3 GL_ATIX_texture_env_route GL_ATIX_vertex_shader_output_point_size GL_ATI_blend_equation_separate GL_ATI_blend_weighted_minmax GL_ATI_shader_texture_lod GL_ATI_texture_compression_3dc GL_Autodesk_valid_back_buffer_hint GL_CR_bounding_box GL_CR_cursor_position GL_CR_head_spu_name GL_CR_performance_info GL_CR_print_string GL_CR_readback_barrier_size GL_CR_saveframe GL_CR_server_id_sharing GL_CR_server_matrix GL_CR_state_parameter GL_CR_synchronization GL_CR_tile_info GL_CR_tilesort_info GL_CR_window_size GL_EXTX_framebuffer_mixed_formats GL_EXT_Cg_shader GL_EXT_color_matrix GL_EXT_color_table GL_EXT_copy_buffer GL_EXT_depth_buffer_float GL_EXT_draw_indirect GL_EXT_gpu_shader5 GL_EXT_gpu_shader_fp64 GL_EXT_import_sync_object GL_EXT_packed_pixels_12 GL_EXT_shader_atomic_counters GL_EXT_shader_subroutine GL_EXT_tessellation_shader GL_EXT_texgen_reflection GL_EXT_texture_buffer_object_rgb32 GL_EXT_texture_compression_bptc GL_EXT_texture_cube_map GL_EXT_texture_edge_clamp GL_EXT_texture_lod GL_EXT_texture_rectangle GL_EXT_transform_feedback2 GL_EXT_transform_feedback3 GL_IMG_sgx_binary GL_INGR_blend_func_separate GL_INTEL_performance_queries GL_KTX_buffer_region GL_MESAX_texture_float GL_MESA_program_debug GL_MESA_texture_array GL_MESA_texture_signed_rgba GL_NVX_conditional_render GL_NVX_gpu_memory_info GL_NVX_instanced_arrays GL_NVX_sysmem_buffer GL_NVX_ycrcb GL_NV_alpha_test GL_NV_blend_minmax GL_NV_centroid_sample GL_NV_complex_primitives GL_NV_draw_buffers3 GL_NV_fragdepth GL_NV_gpu_program4_1 GL_NV_gpu_program_fp64 GL_NV_gpu_shader4_1 GL_NV_sample_shading_control GL_NV_shader_atomic_counters GL_NV_texture_cube_map_array GL_NV_texture_lod_clamp GL_NV_vertex_attrib_64bit GL_SGIS_multitexture GL_SGI_texture_edge_clamp GL_WIN_swap_hint WGL_EXT_render_texture Seen in the GL registry but not in the wild: GLU_EXT_nurbs_tessellator GLU_EXT_object_space_tess GLU_SGI_filter4_parameters GLX_AMD_gpu_association GLX_ARB_create_context GLX_ARB_create_context_profile GLX_ARB_create_context_robustness GLX_ARB_fbconfig_float GLX_ARB_framebuffer_sRGB GLX_ARB_get_proc_address GLX_ARB_multisample GLX_EXT_create_context_es2_profile GLX_EXT_fbconfig_packed_float GLX_EXT_framebuffer_sRGB GLX_EXT_import_context GLX_EXT_scene_marker GLX_EXT_swap_control_tear GLX_EXT_texture_from_pixmap GLX_EXT_visual_info GLX_EXT_visual_rating GLX_INTEL_swap_event GLX_MESA_agp_offset GLX_MESA_copy_sub_buffer GLX_MESA_pixmap_colormap GLX_MESA_release_buffers GLX_MESA_set_3dfx_mode GLX_NV_copy_image GLX_NV_present_video GLX_NV_swap_group GLX_NV_video_capture GLX_NV_video_output GLX_OML_swap_method GLX_OML_sync_control GLX_SGIS_blended_overlay GLX_SGIS_color_range GLX_SGIS_multisample GLX_SGIX_dm_buffer GLX_SGIX_fbconfig GLX_SGIX_hyperpipe GLX_SGIX_pbuffer GLX_SGIX_swap_barrier GLX_SGIX_swap_group GLX_SGIX_video_resize GLX_SGIX_video_source GLX_SGIX_visual_select_group GLX_SGI_cushion GLX_SGI_make_current_read GLX_SGI_swap_control GLX_SGI_video_sync GLX_SUN_get_transparent_index GL_3DFX_multisample GL_3DFX_tbuffer GL_AMD_vertex_shader_layer GL_AMD_vertex_shader_viewport_index GL_ARB_cl_event GL_ATI_text_fragment_shader GL_EXT_422_pixels GL_EXT_cmyka GL_EXT_color_subtable GL_EXT_coordinate_frame GL_EXT_fragment_lighting GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_index_array_formats GL_EXT_index_func GL_EXT_index_material GL_EXT_index_texture GL_EXT_light_texture GL_EXT_misc_attribute GL_EXT_multisample GL_EXT_pixel_transform GL_EXT_pixel_transform_color_table GL_EXT_scene_marker GL_EXT_static_vertex_array GL_EXT_texture_env GL_EXT_texture_perturb_normal GL_EXT_vertex_array_set GL_EXT_vertex_array_setXXX GL_HP_convolution_border_modes GL_HP_image_transform GL_HP_texture_lighting GL_IBM_cull_vertex GL_IBM_static_data GL_IBM_vertex_array_lists GL_INGR_color_clamp GL_INGR_interlace_read GL_INTEL_parallel_arrays GL_INTEL_texture_scissor GL_MESAX_texture_stack GL_NV_bindless_texture GL_NV_fragment_program4 GL_NV_geometry_program4 GL_NV_present_video GL_NV_shader_atomic_float GL_NV_shader_buffer_store GL_NV_tessellation_program5 GL_NV_vertex_program4 GL_OES_byte_coordinates GL_OES_compressed_paletted_texture GL_OES_fixed_point GL_OES_query_matrix GL_OES_single_precision GL_OML_interlace GL_OML_resample GL_OML_subsample GL_PGI_misc_hints GL_PGI_vertex_hints GL_REND_screen_coordinates GL_SGIS_color_range GL_SGIS_detail_texture GL_SGIS_fog_function GL_SGIS_multisample GL_SGIS_point_line_texgen GL_SGIS_sharpen_texture GL_SGIS_texture4D GL_SGIS_texture_color_mask GL_SGIS_texture_filter4 GL_SGIS_texture_select GL_SGIX_async GL_SGIX_async_histogram GL_SGIX_async_pixel GL_SGIX_blend_alpha_minmax GL_SGIX_clipmap GL_SGIX_convolution_accuracy GL_SGIX_flush_raster GL_SGIX_fog_offset GL_SGIX_fog_texture GL_SGIX_fragment_specular_lighting GL_SGIX_framezoom GL_SGIX_instruments GL_SGIX_interlace GL_SGIX_ir_instrument1 GL_SGIX_list_priority GL_SGIX_pixel_texture_bits GL_SGIX_reference_plane GL_SGIX_resample GL_SGIX_sprite GL_SGIX_tag_sample_buffer GL_SGIX_texture_add_env GL_SGIX_texture_coordinate_clamp GL_SGIX_texture_lod_bias GL_SGIX_texture_multi_buffer GL_SGIX_texture_range GL_SGIX_texture_scale_bias GL_SGIX_vertex_preclip GL_SGIX_vertex_preclip_hint GL_SGIX_ycrcb GL_SUNX_constant_data GL_SUN_convolution_border_modes GL_SUN_global_alpha GL_SUN_mesh_array GL_SUN_triangle_list GL_SUN_vertex GL_WIN_phong_shading GL_WIN_specular_fog WGL_3DL_stereo_control WGL_AMD_gpu_association WGL_ARB_buffer_region WGL_ARB_create_context WGL_ARB_create_context_profile WGL_ARB_create_context_robustness WGL_ARB_framebuffer_sRGB WGL_ARB_multisample WGL_ARB_pixel_format_float WGL_ATI_pixel_format_float WGL_EXT_create_context_es2_profile WGL_EXT_depth_float WGL_EXT_display_color_table WGL_EXT_framebuffer_sRGB WGL_EXT_multisample WGL_EXT_pixel_format_packed_float WGL_EXT_swap_control_tear WGL_I3D_digital_video_control WGL_I3D_gamma WGL_I3D_genlock WGL_I3D_image_buffer WGL_I3D_swap_frame_lock WGL_I3D_swap_frame_usage WGL_NV_DX_interop WGL_NV_DX_interop2 WGL_NV_copy_image WGL_NV_float_buffer WGL_NV_gpu_affinity WGL_NV_present_video WGL_NV_render_depth_texture WGL_NV_render_texture_rectangle WGL_NV_swap_group WGL_NV_video_capture WGL_NV_video_output WGL_OML_sync_control Seen in the GLES registry but not in the wild: GL_AMD_compressed_3DC_texture GL_AMD_compressed_ATC_texture GL_AMD_program_binary_Z400 GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_pack_reverse_row_order GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_APPLE_framebuffer_multisample GL_APPLE_texture_2D_limited_npot GL_APPLE_texture_format_BGRA8888 GL_APPLE_texture_max_level GL_DMP_shader_binary GL_EXT_color_buffer_half_float GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_frag_depth GL_EXT_multisampled_render_to_texture GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_robustness GL_EXT_sRGB GL_EXT_shader_texture_lod GL_EXT_shadow_samplers GL_EXT_texture_rg GL_EXT_unpack_subimage GL_IMG_multisampled_render_to_texture GL_IMG_program_binary GL_IMG_read_format GL_IMG_shader_binary GL_IMG_texture_env_enhanced_fixed_function GL_IMG_user_clip_plane GL_NV_EGL_stream_consumer_external GL_NV_coverage_sample GL_NV_depth_nonlinear GL_NV_draw_buffers GL_NV_read_buffer GL_NV_read_depth_stencil GL_NV_texture_compression_s3tc_update GL_NV_texture_npot_2D_mipmap GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_blend_equation_separate GL_OES_blend_func_separate GL_OES_blend_subtract GL_OES_byte_coordinates GL_OES_compressed_paletted_texture GL_OES_extended_matrix_palette GL_OES_fixed_point GL_OES_fragment_precision_high GL_OES_framebuffer_object GL_OES_matrix_get GL_OES_matrix_palette GL_OES_point_size_array GL_OES_point_sprite GL_OES_query_matrix GL_OES_single_precision GL_OES_stencil1 GL_OES_stencil4 GL_OES_stencil8 GL_OES_stencil_wrap GL_OES_texture_cube_map GL_OES_texture_env_crossbar GL_OES_texture_mirrored_repeat GL_OES_vertex_type_10_10_10_2 GL_QCOM_alpha_test GL_QCOM_driver_control GL_QCOM_extended_get GL_QCOM_extended_get2 GL_QCOM_performance_monitor_global_mode GL_QCOM_tiled_rendering GL_QCOM_writeonly_rendering GL_VIV_shader_binary