Almost 12 years ago when the PC-AT was considered a top of the line system, I ran across a small Gantt charting program that would let you track time, resources, and personnel. The program must have impressed me enough that I saved it in my "keeper" archive. The only thing that limits its usefulness is that there is no built-in data entry portion to the program. You have to create your own data files to make the program work. The author claimed that there was an "editor" that accompanied the GANTT program, but apparently I never got it. However, now that we have PalEdit good, old GANTT may rise again.
On the HP Palmtop, if you exit to DOS, switch to the directory that contains the files for GANTT and type the command GANTT GANTT, you'll get a 15 minute tutorial on how to use the program and even how to create the necessary data files. Here are a few screen shots of GANTT's tutorial in operation.
The above screen shows the only contact for the GANTT program. The program is free and, apparently, never did get much support. The screen also mentions the missing Schedule data-entry editor but the enclosed GANTT.PRT file, along with the tutorial may give you everything you need to produce something useful on your HP Palmtop.