Free circular software for windows

The Circular Tetris widget enables you to play a quick game of Torus The Circular Tetris widget for Opera browser allows you to play Circular Tetris or Torus inside your browser window or on your desktop.
You must complete a ring to clear the row.
Controls:
- Left Arrow: Move Left
- Right Arrow: Move Right
- Down Arrow: Move Down
- Up Arrow: Rotate Clockwise
- Space Bar: Rotate Anti-clockwise
Note: To install the widget you have to drag & drop the .zip file on the Opera Widgets Manager window.
System requirements:
- Opera 9 or later

Scientific and Business RPN Calculator with :
- mouse operated, with mouse "keypad"
- standard functions
- trigonometric functions
- finance functions
- RPN (Reverse Polish Notation) mode
- infinite and circular stack
- registers display (stack, 11 memory regs, finance registers)
- display intermediate keystroke and results, status bar
- navigation through history for entry correction and replay (with operation delete, skip, ... options)
- save and reload your calculations to file
- multiple auto-save on exit options
- print
- quick help
- ...
... unmatched features free for ever (no trial period, full version for free)!

Sqirlz Water Reflections 2.6 is a great software for you to insert rippling pools of water, rain or snow effects to images or existing AVI videos.

Version 2 introduced general rainfall and snowfall effects, and the option of adding reflecting areas of water containing circular (ring) ripples like those seen when rain falls onto water.

Major Features:

1. The pools can be animated to give lifelike rippling reflections of the scene above them, and can be of any shape.
2. Choose from a variety of ripple shapes, and control details such as wave size, perspective, water transparency and flow direction.
3. The raindrops and snow flakes can be adjusted in many ways, including size, speed, direction, transparency and scene depth effects.
4. Animations can be saved as Macromedia Flash (SWF) files, animated GIF files, AVI video clips, and sets of bitmap, JPEG, PNG and TIFF files.

Enhancements:

• In this version: can now load AVI files which use XviD, x264vfw (and other) codecs.
  
• Ring ripples can now be added to existing AVI videos which are of long duration as well as short.

Requirements: Windows Me/2000/XP/Vista

Voice Balancing System 1.0 is a smart and professional tool that analyses your voice and generates a v2v (Voice2Voice) balancing tones, includes: easy open wav file capability, complete wav file parameter display (samples, samp. rate, etc...) , real time recording, analyses up to 25"" of voice with circular buffer management, save recording to

Major Features:

1. .WAV file for later use
2. Sound graph with Pan/Zoom capabilities
3. Musical grid containing power proportional hits of musical notes,
4. Bar graphs associated to musical grid displaying totals and octave bars,
5. Plays note contained on musical grid, info grid with complete set of PHI (0.618') based relations of formants.
6. Full 5 octave FFT display with local scale and Note grid optional display.
7. Radial spectrograph in note/octave and FFT format,
8. Harmonic wheel with musical notes relations.
9. V2V graph containing formants and mirror values (max-v(i)) Formant grid, v2v Tone control generation panel.

BVTech Plasmid software is designed to be a DNA plasmid drawing application.
You can use it to draw circle or linear plasmid map with double strands or single strand. You can label the plasmid with genes and restriction sites in different colors, text, and styles.
Main features:
- Plasmid map can be highly customized. You can arrange multiple maps on a page, in linear or circular formats. Each map can be moved, resized, scaled, grouped and colored. To modify a plasmid map, you can use the Plasmid Graphics Wizard, the Plasmid Drawing Tools, Context Menus, and Drag/Drop.
- You can save your works on a document or a picture file (BMP). BVTech Plasmid supports multiple document interface (MDI) just like Microsoft Word. You can also print your plasmid map anytime.
- Fragments can be added to a map to represent features such as genes, motifs, or subcloned fragments. This differs from inserting fragments, which is used to simulate cloning experiments and does alter the size and sequence of the map. Similarly, Removing fragments will not change the size of the map, while deleting fragments will reduce the size of the map.
- You can customize a fragments properties, such as its color, width, and direction, and change its position relative to the map.
- Enzyme Markers can be added to the map to represent a restriction site at a particular location. You can customize a markers properties, such as its font, text, color, position on the page, and whether to show its location in parentheses.
- If you have input a DNA sequence, BVTech Plasmid will be able to find restriction sites for you.
- BVTech Plasmid provides many drawing objects, includs lines, arrows, rectangles, circles, and text boxes. Drawing objects can be used for general annotation or to add extra labels to a map.