diff --git a/.gitignore b/.gitignore
index becab0e..bd5df6c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,4 +27,6 @@ autotest.o
 bits.o
 fp2bit
 fp2bit.o
+bit2fp
+bit2fp.o
 autotest.tmp/
diff --git a/Makefile b/Makefile
index 73fab62..12ed9dd 100644
--- a/Makefile
+++ b/Makefile
@@ -17,20 +17,25 @@ LDLIBS += `pkg-config libxml-2.0 --libs`
 
 MODEL_OBJ = model_main.o model_tiles.o model_devices.o model_ports.o model_conns.o model_switches.o model_helper.o
 
-all: autotest bit2txt draw_svg_tiles new_fp fp2bit hstrrep sort_seq merge_seq
+all: new_fp fp2bit bit2fp draw_svg_tiles \
+	autotest bit2txt hstrrep sort_seq merge_seq pair2net
 
 autotest: autotest.o $(MODEL_OBJ) floorplan.o control.o helper.o model.h
 
 autotest.c: model.h floorplan.h control.h
 
-new_fp: new_fp.o $(MODEL_OBJ) floorplan.o helper.o
+new_fp: new_fp.o $(MODEL_OBJ) floorplan.o helper.o control.o
 
-new_fp.o: new_fp.c floorplan.h model.h helper.h
+new_fp.o: new_fp.c floorplan.h model.h helper.h control.h
 
 fp2bit: fp2bit.o $(MODEL_OBJ) floorplan.o control.o bits.o helper.o
 
 fp2bit.o: fp2bit.c model.h floorplan.h bits.h helper.h
 
+bit2fp: bit2fp.o $(MODEL_OBJ) floorplan.o control.o bits.o helper.o
+
+bit2fp.o: bit2fp.c model.h floorplan.h bits.h helper.h
+
 floorplan.o: floorplan.c floorplan.h model.h control.h
 
 bits.o: bits.c bits.h model.h
@@ -124,7 +129,10 @@ clean:
 		helper.o $(MODEL_OBJ) hstrrep hstrrep.o \
 		sort_seq sort_seq.o \
 		merge_seq merge_seq.o \
-		autotest.o control.o floorplan.o \
+		autotest autotest.o control.o floorplan.o \
+		fp2bit fp2bit.o \
+		bit2fp bit2fp.o \
+		pair2net pair2net.o \
 		xc6slx9_empty.fp xc6slx9.svg \
 		xc6slx9_empty.tiles xc6slx9_empty.devs xc6slx9_empty.conns \
 		xc6slx9_empty.ports xc6slx9_empty.sw xc6slx9_empty.nets \
diff --git a/README b/README
index 52bd2e8..18d8f06 100644
--- a/README
+++ b/README
@@ -14,14 +14,19 @@ Libraries
 - libfpga-bits       reads and writes .bit bitstream files
 - libfpga-floorplan  reads and writes .fp floorplan files
 - libfpga-control    programmatic access to libfpga-model
+- libfpga-design     larger design elements on top of libfpga-control
 - libfpga-test       test harness for libfpga-model and libfpga-control
 
-Utilities
+Design Utilities
+
+- new_fp             creates empty .fp floorplan file
+- fp2bit             converts .fp floorplan into .bit bitstream
+- bit2fp             converts .bit bitstream into .fp floorplan
+- draw_svg_tiles     draws a simple .svg showing tile types
+
+fpgatools Development Utilities
 
 - autotest           executes test suite
-- new_fp             creates empty .fp floorplan file
-- draw_svg_tiles     draws a simple .svg showing tile types
-- fp2bit             converts .fp floorplan into .bit bitstream
 - bit2txt            dumps .bit bitstream as text
 - hstrrep            high-speed hashed array based search and replace util
 - sort_seq           sorts line-based text file by sequence numbers in strings
diff --git a/bits.c b/bits.c
index 89a18c5..b91b84b 100644
--- a/bits.c
+++ b/bits.c
@@ -8,6 +8,11 @@
 #include "model.h"
 #include "bits.h"
 
+int read_bits(struct fpga_model* model, FILE* f)
+{
+	return 0;
+}
+
 int write_bits(FILE* f, struct fpga_model* model)
 {
 	return 0;
diff --git a/bits.h b/bits.h
index 658210e..d657061 100644
--- a/bits.h
+++ b/bits.h
@@ -5,4 +5,5 @@
 // For details see the UNLICENSE file at the root of the source tree.
 //
 
+int read_bits(struct fpga_model* model, FILE* f);
 int write_bits(FILE* f, struct fpga_model* model);
diff --git a/floorplan.c b/floorplan.c
index e2d7404..b9c6ce6 100644
--- a/floorplan.c
+++ b/floorplan.c
@@ -757,3 +757,8 @@ next_line: ;
 	}
 	return 0;
 }
+
+int write_floorplan(FILE* f, struct fpga_model* model)
+{
+	return 0;
+}
diff --git a/floorplan.h b/floorplan.h
index e88500e..dec7042 100644
--- a/floorplan.h
+++ b/floorplan.h
@@ -25,6 +25,7 @@
 //
 
 int read_floorplan(struct fpga_model* model, FILE* f);
+int write_floorplan(FILE* f, struct fpga_model* model);
 
 void printf_version(FILE* f);
 int printf_tiles(FILE* f, struct fpga_model* model);
diff --git a/pair2net.c b/pair2net.c
index 890f9d5..1a74597 100644
--- a/pair2net.c
+++ b/pair2net.c
@@ -16,7 +16,7 @@
 
 #define ALLOC_INCREMENT 16
 
-int add_entry(uint32_t** net, uint32_t new_idx)
+static int add_entry(uint32_t** net, uint32_t new_idx)
 {
 	if (!*net) {
 		*net = malloc(ALLOC_INCREMENT*sizeof(**net));
@@ -44,7 +44,7 @@ int add_entry(uint32_t** net, uint32_t new_idx)
 	return 0;
 }
 
-int print_nets(uint32_t** nets, struct hashed_strarray* connpt_names)
+static int print_nets(uint32_t** nets, struct hashed_strarray* connpt_names)
 {
 	int i, j, num_connpoints, num_nets, largest_net, total_net_connpoints;
 	const char* str;
@@ -82,7 +82,7 @@ int print_nets(uint32_t** nets, struct hashed_strarray* connpt_names)
 
 struct hashed_strarray* g_sort_connpt_names;
 
-int sort_net(const void* a, const void* b)
+static int sort_net(const void* a, const void* b)
 {
 	const uint32_t* _a, *_b;
 	const char* a_str, *b_str;
@@ -99,7 +99,7 @@ int sort_net(const void* a, const void* b)
 	return strcmp(a_str, b_str);
 }
 
-int sort_nets(uint32_t** nets, struct hashed_strarray* connpt_names)
+static int sort_nets(uint32_t** nets, struct hashed_strarray* connpt_names)
 {
 	int i;