Masterra

Founded in 1999, Masterra (former MathTerra Software) specializes in writing Windows desktop applications for using at home and office.

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PostSmile
Free
Add smiley faces to your e-mails to make them emotional.
Windows
ByteSweeper
Trial version
Delete unnecessary files from your system to increase computer performance.
Windows
Love II Smiley Collection for PostSmile
Free
Get sets of animated and romantic Smileys for your messages.
Windows
Bugs Images Collection
Free
Get animated and non-animated images of bugs from PostSmile for your e-mails.
Windows
Summer Smiley Collection
Free
Decorate your e-mail messages and Web forum postings.
Windows
Valentine Smiley Collection for PostSmile
Free
Get a collection of Valentine-themed smileys.
Windows