The Changed Man, by Orson Scott Card
There Will be War 3, created by Jerry Pournelle. Blood and Iron
The Iron Thorn, by Algis Budrys
The Darkness on Diamondia, by A E van Vogt
The War Against the Rull, by A E van Vogt
The Wizard of Anharitte, by Colin Kapp
The Hammer of God, by Arthur C Clarke
This is the Way the World Begins, by J T McIntosh
The Red Tape War, Jack L Chalker, Mike Resnick, George Alec Effinger
The Mocking Program, by Alan Dean Foster
The Longest Way Home, by Robert Silverberg
The Ring of Ritornel, by Charles L Harness
The World Menders, by Lloyd Biggle Jr
Vigilant, by James Alan Gardner
The Loafers of Refuge, by Joseph Green
The Final Battle, by William C Dietz
Time and Stars, by Poul Anderson
The Diamond Contessa, by Kenneth Bulmer
The Coming of Vertumnus, by Ian Watson
War Worlds IV, created by Jerry Pournelle. Invasion
The People Trap plus Mindswap, by Robert Sheckley
The Testament of Andros, by James Blish
The Wrong End of Time, by John Brunner
The Furious Future, by Algis Budrys