Unrooted is a tree drawing program able to draw any binary tree expressed in the standard phylogenetic tree format (e.g., the format used by the PHYLIP package). Trees are drawn in an unrooted way, that is, using a circular shape, with labels aligned with terminal branches.
ACD/ChemSketch is a chemically intelligent drawing interface that allows you to draw almost any chemical structure including organics, organometallics, polymers, and Markush structures. It also includes features such as calculation of molecular properties (e.g., molecular weight, density, molar refractivity etc.), 2D and 3D structure cleaning and viewing, functionality for naming structures (fewer than 50 atoms and 3 rings), and prediction of logP.Use it to produce professional looking structures and diagrams for reports and publications.
PLT is a program for producing chemical drawings and outputting them in a variety of formats. It will run on all versions of Windows (95, 98, NT, ME, 2000, XP, Vista, Win 7). PLT provides routines for producing all rings and line types used in chemical structures, formatted text material in any TrueType font installed on your system (including greek characters and special chemical characters like radical anion, radical cation, double dagger) and supports the use of color.
loopDloop is a tool for drawing RNA secondary structures in molecular biology. It will read files that include biosequence data with base pairing information. It will display graphical views of the sequences secondary molecular structure. Various options allow one to modify,adorn and edit the structure. Standard application functions to save,print, edit and manage preferences are included. This program will not estimate nor produce the base pairings needed for secondary structure. For that, other software such as RNAFOLD, MulFOLD, and multiple sequencealignment editors may be used.