You can do a Google web search on: activex controls for Microsoft Access
and get quite a few hits.
Third-party controls often do add value and make a user interface visually
interesting. Be aware, though, that Microsoft has published a list of
ActiveX controls that it indicates have been "tested and verified" for use
with Access. Here are some links.
ActiveX Controls Supported in Access 97:
http://support.microsoft.com/default.aspx?scid=kb;en-us;160126
ActiveX Controls Supported in Access 2000
http://support.microsoft.com/default.aspx?scid=kb;en-us;208283
A couple of other things to keep in mind regarding third-party controls are:
1. You will, of course, make sure that the control is designed to work with
your version of Access and Windows. But if you have no control over users'
computer configurations, particularly Windows, you may have problems.
2. Many employers forbid the use of third-party controls in their
applications because of the cost of maintenance. Or, because after the
programmer went on to another job, the employer found out that he did not
own the license for these third-party controls and could not upgrade the
application without purchasing them. Check with your employer first.