Thank you!

Froguts is freely available to explorers of biology

Froguts has been around since 2001. Rick, David, and Joni have had the honor of providing this resource to learners around the world. As of January 1st, 2019, we are no longer able to sustain the company and support new subscribers while we also pursue our other careers in education, healthcare data science, and museology. It is bittersweet to leave our passion for Froguts while we continue to advance education and science through other means. It truly has been our privilege to know each of our subscribers for the last 18 years. Thank you for the opportunity!

We have decided to provide free access to the online service (details below) as long as Google supports the Flash technology in its Chrome browser. Google has indicated that Flash support will end in late 2019. In addition to providing access to the online service, we are offering everyone a free download of all Froguts modules (Frog, Squid, Cow Eye, Fetal Pig, Owl Pellet, Pea, Fruit Fly). The downloaded software should work on Mac and Windows based machines for many years to come (see details below) once downloaded. In fact, the expiration date on the downloaded software has been set for 100 years, hopefully by then a better solution for learning about biology systems is available!

We regret that we can no longer provide support for the free versions of the online or download service. Froguts will provide support to existing subscribers only until their current subscription expires. We are working to find a long-term hosting solution for the free online and download service. Until we secure a new home for these resources, we are committed to hosting them through 2019. Froguts will not be accepting faxes, physical mail, calls, or email from anyone other than existing subscribers.

If you are an existing subscriber, and need support, please contact

Free Online Service


Username: Frog (Capitalize the 'F')

Password: guts (all small case)

Notes: This link is best viewed in Google's Chrome browser version 69 or prior. If you are using a newer version of Chrome, you will need to enable Flash (visit Google Support for instructions). Google has announced that in late 2019 that sites that use the Flash technology, like this service, will no longer be supported or viewable in Chrome. We do not believe you will be able to use the online service once Google sunsets support for Flash.

Free Download

Download Link:

Software will expire on: 12/31/2040

Notes: The download comes prepackaged with the Flash Player. It can be used on Mac and Windows operating systems. In order for the software to work properly on either system, please do not move the .exe (Windows) or the .app (Mac) from the downloaded Froguts_v6 folder. You can make shortcuts or links to either executable if you wish and place the shortcut, link, or alias anywhere on your system.

For Mac: If you receive a message indicating that 'Activation' is required while running the Mac version of the Froguts App, it is due to Apple's quarantining of downloaded software. You can remove the quarantine using the instructions below. You can get more information about Apple quarantine here.

How To Remove Apple Quarantine of Downloaded Files:

  1. Download the Froguts software to your Mac desktop
  2. Double-click on the zipped file on your desktop named:
    1. A folder named "Froguts_v6" should appear on your desktop, you will need to leave it on the desktop
  3. Open the Mac Terminal application
    1. Press the COMMAND key and SPACEBAR (At The Same Time) to launch Spotlight (a Mac OS native application)
    2. A Spotlight window with a text field should appear
    3. Type "Terminal" into the Spotlight text field, then double-click the search result that says ''
  4. Copy and Paste this command into the Terminal window:
    xattr -d /Users/$USER/Desktop/Froguts_v6/
  5. While still in the Terminal, and while the cursor is at the end of the above pasted command, press the RETURN key
  6. You should now be able to double-click the inside the Froguts_v6 folder on your desktop, and run the software without being asked to activate