KnovelExcelAddin 2.0.4.6 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the free software is Knovel Corporation. The software is included in Office Tools. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The most popular version of the software 1.0.
From the developer:
Knovel’s Excel Add-In installs a tab to your Excel desktop that provides one-click access to Knovel’s search and unit conversion tools. Knovel’s data analysis tools ensure you not only find the information hidden in complex graphs, equations and tables quickly, but also analyze and manipulate data as easily as sorting a spreadsheet.
You may want to check out more software, such as Accent Composer, AceHide Free or Document Trace Remover, which might be related to KnovelExcelAddin.