diff -up dwm-4.3/config.default.h dwm-4.3-viewlast/config.default.h
--- dwm-4.3/config.default.h	2007-07-14 20:11:29.000000000 +0100
+++ dwm-4.3-viewlast/config.default.h	2007-07-15 11:35:59.000000000 +0100
@@ -52,6 +52,7 @@ static Key key[] = { \
 	{ MODKEY,			XK_k,		focusclient,	"-1" }, \
 	{ MODKEY,			XK_m,		togglemax,	NULL }, \
 	{ MODKEY,			XK_Return,	zoom,		NULL }, \
+	{ MODKEY,			XK_Tab,	viewlast,		NULL }, \
 	{ MODKEY|ShiftMask,		XK_space,	togglefloating,	NULL }, \
 	{ MODKEY|ShiftMask,		XK_c,		killclient,	NULL }, \
 	{ MODKEY,			XK_0,		view,		NULL }, \
Only in dwm-4.3-viewlast/: config.default.h.orig
diff -up dwm-4.3/dwm.h dwm-4.3-viewlast/dwm.h
--- dwm-4.3/dwm.h	2007-07-14 20:11:29.000000000 +0100
+++ dwm-4.3-viewlast/dwm.h	2007-07-15 11:37:37.000000000 +0100
@@ -87,6 +87,7 @@ extern unsigned int ntags, numlockmask;	
 extern void (*handler[LASTEvent])(XEvent *);	/* event handler */
 extern Atom wmatom[WMLast], netatom[NetLast];
 extern Bool selscreen, *seltag;			/* seltag is array of Bool */
+extern unsigned int currenttag, lasttag;  /* The last tag viewed */
 extern Client *clients, *sel, *stack;		/* global client list and stack */
 extern Cursor cursor[CurLast];
 extern DC dc;					/* global draw context */
@@ -143,6 +144,7 @@ void settags(Client *c, Client *trans);	
 void tag(const char *arg);		/* tags sel with arg's index */
 void toggletag(const char *arg);	/* toggles sel tags with arg's index */
 void toggleview(const char *arg);	/* toggles the tag with arg's index (in)visible */
+void viewlast(void);     /* views the last viewed tag */
 void view(const char *arg);		/* views the tag with arg's index */
 
 /* util.c */
Only in dwm-4.3-viewlast/: dwm.h.orig
Only in dwm-4.3-viewlast/: dwm.h.rej
diff -up dwm-4.3/main.c dwm-4.3-viewlast/main.c
--- dwm-4.3/main.c	2007-07-14 20:11:29.000000000 +0100
+++ dwm-4.3-viewlast/main.c	2007-07-15 11:38:06.000000000 +0100
@@ -19,6 +19,7 @@ int screen, sx, sy, sw, sh, wax, way, wa
 unsigned int bh, ntags;
 unsigned int bpos = BARPOS;
 unsigned int numlockmask = 0;
+unsigned int currenttag, lasttag;
 Atom wmatom[WMLast], netatom[NetLast];
 Bool *seltag;
 Bool selscreen = True;
@@ -183,6 +184,8 @@ setup(void) {
 	sw = DisplayWidth(dpy, screen);
 	sh = DisplayHeight(dpy, screen);
 	initlayouts();
+  currenttag = 0;
+  lasttag = 0;
 	/* bar */
 	dc.h = bh = dc.font.height + 2;
 	wa.override_redirect = 1;
Only in dwm-4.3-viewlast/: main.c.orig
Only in dwm-4.3-viewlast/: main.c.rej
diff -up dwm-4.3/tag.c dwm-4.3-viewlast/tag.c
--- dwm-4.3/tag.c	2007-07-14 20:11:29.000000000 +0100
+++ dwm-4.3-viewlast/tag.c	2007-07-15 11:35:59.000000000 +0100
@@ -140,13 +140,27 @@ toggleview(const char *arg) {
 }
 
 void
+viewlast(void) {
+  char buf[32];
+  snprintf(buf, sizeof buf, "%d", lasttag);
+  view(buf);
+  lt->arrange();
+}
+
+void
 view(const char *arg) {
 	int i;
 
 	for(i = 0; i < ntags; i++)
 		seltag[i] = arg == NULL;
 	i = arg ? atoi(arg) : 0;
-	if(i >= 0 && i < ntags)
+	if(i >= 0 && i < ntags) {
 		seltag[i] = True;
+
+    if (currenttag != i) {
+      lasttag = currenttag;
+      currenttag = i;
+    }
+  }
 	lt->arrange();
 }
Only in dwm-4.3-viewlast/: tag.c.orig