There are plenty of options depending on the needs you have.
If you're not interested in the physical cheap ones that come with a graph (Deltatrack has one, there are disposable and reusable ones from different brands;
There's Sensitech with the TempTaleUltra and other types that could be both options (if you want a reusable one to change the parameters you do need a softwar, they also have the ones with a physical graph;
Biotempak with very nice disposable ones in a small sealed bag that could be connected to the computer and download the info without software.
Deltatrack again with both options and the physical graph too.
Really depends on what are your requirements.
Hope that helps. :) Regards.