Add a few comments.

ptyhelper.c

@@ -1,3 +1,9 @@
+/*
+ * ptyhelper: a utility that runs a command in a pseudoterm and then streams
+ * stdio to/from it.  Intended to get around the node.js loss of C/UNIX 
+ * functionality.
+ * Remember to compile with -lutil.
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>

quickrypt.c

@@ -1,3 +1,6 @@
+/*
+ * quickrypt: a quick and dirty crypt(3) utility for use with node.js.
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

shterm.js

@@ -1,3 +1,7 @@
+/* shterm.js: browser-side JavaScript to handle I/O for termemu.js when it 
+ * is running a shell via the webtty.js server.
+ */
+
 // A state machine that keeps track of polling the server.
 var ajaxstate = {
   state: 0,