Thanks go out so the following people who have helped bring tree to the pinnacle of perfection that it is: ;)

• Added HTML output (-H).
• Added options -o, -L and -R.

• Added -S option to print ASCII graphics lines for use under linux console when an alternate console font has been selected (might also work under DOS telnet).

• Made tree more portable. Should compile under solaris.

• Discovered bug where tree will segmentation fault on long pathnames.
• Discovered in -L argument processing.

• Discovered problem with recursive symlink detection

• Suggested option to remove file and directory report at end of tree listing.

• Spotted memory over-allocation bug in read_dir().
• Submitted several patches to fix various memory leaks.

• Reported that Tru64 defines TRUE/FALSE in sys/types.h (OSF1 standard?)

• Found bug in tree that caused it to seg-fault if 50 file arguments where given and directory coloring was turned on.

• Discovered tree crashed on missing arguments.
• Discovered that tree did not properly encode characters in filenames when used as URLs when using the -H option.

• Pointed out that tree did not list large files.

• Submitted patch which fixed a compiler issue and cleaned up HTML and CSS code, applied CSS to all output, and fixed up HTML to 4.01 strict standards.

• Added '|' support to the pattern matching routines.

• Pointed out that -t did not sort properly for files with the same timestamp.
• Suggested option to change HTML title and H1 string.
• Suggested -r option for reversed alphanumeric sort ala 'ls -r'.

• Provided patch to support OS/2, fix HTML encoding, provide charset support. Added to authors list.

• Debian maintainer who pointed out problems and applied fire to feet to fix stuff.

• Suggested -h option for human readable output for -s, ala ls -lh.

• Supplied patch to make tree under cygwin.

• Provided patch to fix a colorization bug when dealing with special files and directories that seem to have an extension.

• Suggested removing trailing slash on user supplied directory names if -f option is used.

• Pointed out broken HTML output in 1.5.1.

• Suggested --filelimit option.

• Suggested -v option (version sort).

• Provided build options for Solaris.

• Provided build options and source mods for HP NonStop support.

• Noted that setlocale() should come before MB_CUR_MAX check.

• Submitted patch to remove compiler warnings for Solaris.

• Provided patch which fixes issue where indent may output more than it should when dirs[*] is not properly cleared before use.

• Showed that tree was not properly quoting arguments to recursively called tree instances when using -R.

And many others whom I've failed to keep track of. I should have started this list years ago.