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Graphmatica is an equation plotter which supports five types of planar graphs (including polar, parametric, logarithmic, inequalites and limited implicit plots), plots planar vector fields and solutions of the corresponding differential equations, unlimited graphs on screen at once, saving setup information and lists of equations, flexible grid labeling, lock-on coordinate cursor and several ways to resize the grid. Its calculus options include symbolic differentiation, drawing of tangent lines, and numerical integration (you use a mouse to select points and areas). Offers on-line help and demonstration files. grmat36d.zip is the DOS version (3.60), grmat16w.zip is the Microsoft Windows 3.1 version (1.60), and grmat16n.zip is the 32 bit or win32 version (1.60). This is a fully functional shareware package.

Swiss PDB Viewer is a free program to display, analyze and manipulate PDB protein structures. Next to features such as protein superimposition, H-bond detection, amino acid mutation etc., the protein is tightly linked to Swiss- Model, an automated homology modeling server running at the Geneva Biomedical Research Center. This allows for threading a protein primary sequence to a 3D template and analyzing homology. The displaying options of the program include spacefill, ball & stick, stick and ribbon representations, all of which can be applied simultaneously within one structure model.

"School Maestro III is a comprehensive teacher productivity tool. The included grading program is the most advanced program available and supports a wide variety of different grading methods. It also tracks attendance and discipline, does seating charts, allows subjective grades, creates reusable lesson plans, report cards, honor rolls, GPAs, and transcripts. Reports are available via the Internet and form letters with optional report attachments may be emailed. "

Mathcad offers you an integrated environment for performing and communicating your math-related work. It provides hundreds of operators and built-in functions for solving technical problems. Use Mathcad to perform numeric calculations or to find symbolic solutions. It automatically tracks and converts units and operates on scalars, vectors, and matrices. Integrated images, text, graphs, and mathematics means your whole solution is contained and documented in one place. Formatting options and style sheets let you prepare documents to exact specifications. Distribute your work in Mathcad, the Mathcad Client, print, or as MathML for the web.

You can use most of the options we discussed in Google's Advanced Search Form in a regular search box query. If you're a frequent searcher or a "power searcher," this can save time because you don't need to open the Advanced Search page and fill in various boxes; instead, you can enter the refined query in almost any Google search box.