TinkerShop programmers to hire on a project to project basis Tel: (216) 469-8643

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Inventory Worksheet assists to compute different inventory scenarios your business may face. Forecast your demand, calculate total cost of inventory, and experiment with "what if" inventory scenarios. Includes complex forecasting methiod such as Silver-Meal algorithm.

Mow available in Palm OS version and MS Excel version

Nephro Calculator

Nephrology Calculator aids nephrologists all over the world to get quick results for various nephrology and dialysis related problems. Get quick answers for: Kt/V Daugirdas, Access recirculation Urea Reduction Ratio, Bicarbonate Deficit, H2O Deficit, IVC/BSA Ratio, Fractional Excretion, Creatinine Clearencein all in one place. Includes a useful print button that gnerates a printable form with all calculations.


Gobzi is a VFR crosscountry calculator for Palm OS based hand held computers. This application calculates crosswind component, and head/tail wind component. In addition, it calculates time no route, flight time for remaining fuel and remaining fuel in gallons. Calculates time between checkpoints, and in crosscountry mode subtracts each check point distance from total distance.

In addtion to these handy features, includes a density altitude and pressure altitude calculator. Also I have thrown in a measurement conversion calcualtor to convert gallons to liters, nautical miles, statute miles to kilometers, and temperature conversion.


TreeRep is a file/string management utility. This program allows you to search for and delete or replace text in a file or in a number of files.

The power of TreeRep lies in its versatility. TreeRep allows you to seach for a string in a directory and in all its subsequent subdirecories before you do any string replacement. Once your text is found, that file is automatically added to your selection. After the search is complete, the program returns into replace mode. You are now ready to implement your changes. Of course you can select files manually as well. For example, to manage a web-site with a number of subdirectories and often hundreds of files, TreeRep is an essential program. I tested the program on an Intranet site that contained 6527 *.htm files.

Searching is so powerful that you can even do inverse search as well. That is, find all files that do not contain your string !

Best of all, the price is right, TreeRep is a freeware! You can use it at your convenience. TreeRep is apporved by " BOOT IT Software Reviews" as one of the best of the web's free programs.

MapSite allows you to "map" an entire website, finding all the links to all pages and sites. Once you have a list, you can search through to find one specific link or file.

LinkDir is a very small program that will let you find all files in a directory and list those files in a webpage. The list is aseries of links to each file in that directory.

Runs on Windows 95 or NT. Requires vb40032.dll. (vb40032.dll is supposed to be in windows\system directory) This is a freeware.

[ With setup: (1.2 Mbyte) ]
[ Without setup, program only: (25 Kbyte) ]


DosTree.zip is a DOS based executable program that does multiple file string replacement across the entire directory or if you choose so, through all subdirectories as well. This program was designed to be compact but powerful and fast. Freeware.

TinkerShop uses Linux for development and as its server platform

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TinkerShop programs using Perl, Python, PHP, and other Open Source languages


          e-mail:   tinkershop @ tinkershop.net
          Tel:      (216) 469-8643