Applied the 'launcher' patch, version '20200527-f09418b'.

config.def.h

@@ -22,6 +22,14 @@ static const char *colors[][3]      = {
 /* tagging */
 static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
 
+/* launcher commands (They must be NULL terminated) */
+static const char* kitty[]     = { "kitty", NULL };
+
+static const Launcher launchers[] = {
+       /* command       name to display */
+	{ kitty,         "Kitty" },
+};
+
 static const Rule rules[] = {
 	/* xprop(1):
 	 *	WM_CLASS(STRING) = instance, class

dwm.c

@@ -142,6 +142,11 @@ typedef struct {
 	int monitor;
 } Rule;
 
+typedef struct {
+	const char** command;
+	const char* name;
+} Launcher;
+
 /* function declarations */
 static void applyrules(Client *c);
 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
@@ -444,10 +449,28 @@ buttonpress(XEvent *e)
 		if (i < LENGTH(tags)) {
 			click = ClkTagBar;
 			arg.ui = 1 << i;
-		} else if (ev->x < x + blw)
+			goto execute_handler;
+		} else if (ev->x < x + blw) {
 			click = ClkLtSymbol;
-		else if (ev->x > selmon->ww - (int)TEXTW(stext))
+			goto execute_handler;
+		}
+
+		x += blw;
+
+		for(i = 0; i < LENGTH(launchers); i++) {
+			x += TEXTW(launchers[i].name);
+			
+			if (ev->x < x) {
+				Arg a;
+				a.v = launchers[i].command;
+				spawn(&a);
+				return;
+			}
+		}	
+
+		if (ev->x > selmon->ww - (int)TEXTW(stext))
 			click = ClkStatusText;
+
 		else
 			click = ClkWinTitle;
 	} else if ((c = wintoclient(ev->window))) {
@@ -456,6 +479,9 @@ buttonpress(XEvent *e)
 		XAllowEvents(dpy, ReplayPointer, CurrentTime);
 		click = ClkClientWin;
 	}
+
+execute_handler:
+
 	for (i = 0; i < LENGTH(buttons); i++)
 		if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
 		&& CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
@@ -736,6 +762,13 @@ drawbar(Monitor *m)
 	drw_setscheme(drw, scheme[SchemeNorm]);
 	x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0);
 	
+	for (i = 0; i < LENGTH(launchers); i++)
+	{
+		w = TEXTW(launchers[i].name);
+		drw_text(drw, x, 0, w, bh, lrpad / 2, launchers[i].name, urg & 1 << i);
+		x += w;
+	}
+
 	if ((w = m->ww - tw - x) > bh) {
 		if (m->sel) {
 			drw_setscheme(drw, scheme[m == selmon ? SchemeSel : SchemeNorm]);