Masterra

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

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Valentine Smiley Collection for PostSmile
Free
Masterra Valentine Smileys: Express Love with Animated Emojis
Windows
Love II Smiley Collection for PostSmile
Free
Express Love with Animated Smileys and Quotes
Windows
Summer Smiley Collection
Free
Enhance Your Messages with Animated Smileys
Windows
PostSmile
Free
Add smiley faces to your e-mails to make them emotional.
Windows
ByteSweeper
Trial version
ByteSweeper: Boost PC Performance and Free Up Space
Windows
Bugs Images Collection
Free
PostSmile Bugs Collection: Animate Your Emails and Forum Posts
Windows