You could have downloaded Textank 1.0 for Mac from our software library for free. The application lies within Business Tools, more precisely General.
From the developer:
Textank is a database application used for quick filing of text. By creating categories and key words, you can easily locate information downloaded from sources such as the Web and email. Instead of having your hard drive cluttered with miscellaneous text files, your data is filed away by categories and keywords you create. The entire database is searchable and can be viewed at once for easy access.