Please find below a list of Source codes for SLICOT software that can be downloaded via Obtaining SLICOT. SLICOT Version 4.5 Archives are available under GNU License policy and are directly and freely downloadable for everybody.
The Release Notes can be dowloaded below from this page.

SLICOT Source Code Archives

Main SLICOT Archives

• slicot.tar.gz
  Contains the SLICOT Library source files and related example and documentation files for Unix platforms.
• slicotPC.zip
  Contains the SLICOT Library source files and related example and documentation files for Windows platforms.

SLICOT Version 4.5 Archives

• slicot45.tar.gz
  Contains the SLICOT Library Version 4.5 source files and related example and documentation files for Unix platforms.

• slicotPC45.zip
  Contains the SLICOT Library Version 4.5 source files and related example and documentation files for Windows platforms.

Parallel SLICOT Archives for Model Reduction

• pab09a.tar.gz
  Contains source codes for model reduction of high order systems by direct methods.
• plicmr.tar.gz
  Contains source codes for model reduction of high order systems by iterative methods.

Interface to Nonlinear Solvers Archives

• ODESolver.tgz
  Contains interface codes for the ordinary differential equations solvers.
• DAESolver.tgz
  Contains interface codes for the differential algebraic equations solvers.
• EtcSolver.tgz
  Contains interface codes for:
  - the differential Riccati equations solver DRESOL;
  - the nonlinear algebraic equations solver KINSOL;
  - the optimization problems solver FSQP.

BLAS Level-3 Implementations of Common Solvers for (Quasi-)Triangular Generalized Lyapunov Equations

• SLWN2014_1_code.tar.gz
  Contains Fortran 90 BLAS Level-3 codes for solving (quasi-)triangular generalized Lyapunov equations on Linux Ubuntu 12.10.

Release Notes

• Release.Notes
  Describes the latest changes/additions.
• Release.History
  Contains the Release Notes for SLICOT Release 5.
• Release4.History
  Contains the Release Notes for SLICOT Release 4.
• Release3.History
  Contains the Release Notes for SLICOT Release 3.

Vasile Sima, April 28, 2005, updated: October 18, 2009