- Tic-Tac-Toe - Play your your friend or your web browser with three levels of difficulty.
- Multiplication Game - A puzzle in which letters represent digits in a multiplication problem.
- FizzBuzz - A competitive mathmatical counting game that can be played in your web browser.
- Dice - Roll dice. Dice of any size are supported, as well as sets of dice that can be saved.
- Sudoku - A playing board for Sudoku that enforces the rules -- it only allows unique numbers in any row, column, or section.
- Word calculator for Wordle - Show which words fit into Wordle puzzles.

- Currency Rate Exchange Conversion Calculator - Convert any of over two hundred currencies into any other. Exchange rates updated daily.
- Latitude and Longitute - Converts between various formats of global coordinates.
- Length - A calculator that can convert between units of length and distance.
- Mortgage Calculator - See how much a mortgage costs per month or in interestest for the life of the mortgage.
- Scientific Calculator - Features calculation history, math functions, hexidecimal, octal, and scientific notation.
- Significant Figures - A calculator that can format a number to have the specified number of significant digits.
- Temperature - A temperature converter that uses significant digits.
- Triangle - Calculator that uses trigonometry to calculate information about triangles.

- Length - A calculator that can convert between units of length and distance.
- Significant Figures - A calculator that can format a number to have as many significant figures as desired.
- Temperature - A temperature converter that uses significant figures and can display scientific notation.
- Scientific Calculator - Features calculation history, math functions, hexidecimal, octal, and scientific notation.

- Calendar - Adjustable one month calendar with U.S. holidays.
- Clock - Displays the current time.
- Clock and Calendar - The clock and calendar on one page.
- Currency Rate Exchange Conversion Calculator - Convert any of over two hundred currencies into any other. Exchange rates updated daily.
- Scientific Calculator - Features calculation history, math functions, hexidecimal, octal, and scientific notation.
- Password Creator - Create secure random passwords.

- Roman Numerals - A calculator that can convert between Arabic and Roman numerals.
- Triangle - Calculator that uses trigonometry to calculate information about triangles.
- FizzBuzz - A competitive mathmatical counting game that can be played in your web browser.

- Weight Chart - Customize a weight chart that you can print out to record your weight.

- Programmer's Cheat Sheet - A reference for computer programmers.
- Small ASCII Chart - Chart that shows numeric character values in hex and decimal.
- Large ASCII Chart - Shows character values in hex, decimal, octal, and binary. Has descriptions for non-printable characters.
- URL and Base64 Encoder and Decoder - Copy and paste data to be encoded or decoded using Base64 or URL encoding.
- Max Sum in a Sequence - Algorithm to find the maximum sum of any sub-sequence in a sequence of integers.
- Google Analytics Time Period Links - Links into your Google Analytics account for other than the default 30 day period.
- Password Creator - Create secure random passwords.

- Mortgage Calculator - See how much a mortgage costs per month or in interestest for the life of the mortgage.

Copyright Stephen Ostermiller 2002-2021