Initial Value Problems - The code GAM numerically solves solves first order ordinary differential equations, either stiff or nonstiff in the form y'=f(x,y), with a given initial condition. The code GAMD is a generalization of GAM for the solution of Differential Algebraic Equations of index less than or equal to 3 in the form M y' = f(x,y), with a given initial condition. By Francesca Mazzia. DVERK - Fortran 77 subroutine written by Hull, Enright and Jackson for the numerical solution of systems of initial value problems for ordinary differential equations. ODEPACK - Serial Fortran Solvers for ODE initial value problems. BIFPACK - Fortran 77 package for bifurcation, continuation and stability analysis. Test Set for Initial Value Problem Solvers - Test sets, solvers and links for Initial Value Problems for ODEs. ODE - Codes for ordinary differential equations from Netlib. Blended Implicit Methods (BiM) - Fortran 77 code implementing a variable order-variable stepsize method for (stiff) initial value problems for ODEs. The order of the method varies from 4 to 14, according to a suitable order variation strategy. Differential Equation Software - Code for Initial Value and Boundary Value Problems.