Rdex

Rdex is a small-sized and portable software program whose purpose is to help you store phone numbers, addresses, IDs, birth dates and other types of personal information in a digital environment. It features only basic text editing options.

Since there is no setup pack involved, you can drop the executable file anywhere on the hard drive and just click it to launch Rdex. Otherwise, you can keep it stored on a USB flash drive to directly run it on any PC with minimum effort. Moreover, unlike most installers, it doesn't modify Windows registry settings.

Based on a normal window with a neatly organized structure, the interface is user-friendly. You can create a new card file by typing or pasting text, as well as use a basic search function to quickly locate a particular piece of information by inputting a keyword.

The card can be saved with the Rdex format (RDX) in ASCII or UTF-8 mode, and later opened to resume editing. Alternatively, you can save it as a plain text document to be able to access it with any other text viewer. It's possible to customize basic font settings (e.g. type, style, size, effects), delete cards, as well as to obtain a list with all cards.

There were no stability issues in our tests, thanks to the fact that the app didn't hang, crash or prompt error messages. Unsurprisingly, its impact on the overall performance of the machine was barely noticeable, as it needed low CPU and RAM to work properly.

On the other hand, Rdex is just like any other text editor, since it doesn't contain any outstanding features. You can test it for yourself, though, since it's freeware.