Games similar to Warlight include The Battle for Wesnoth, which is free and open source. Other options are FreeCiv, Domination, TripleA and Imperial Domination. There's no shortage of Turn Based Games like Warlight, with more than 25 alternatives for Windows, Linux, Android, Mac and iPad.
Lux Delux is a game of strategy and domination inspired by the board game Risk. Control your armies to conquer and hold strategic countries on the map. The object of the game is simple: Take over the entire world!
Canada
Exoplanet War is a free, browser-based MMORTS online game with no download required. You can play the game anywhere anytime with thousands of real players.
The action begins in 2050, when humanity by their ignorance destroyed the Earth. The colony you are about to develop is the only salvation for you and the people who have followed you, as well as those who will join you along the way.
iirtw (if i ruled the world) is another clone of the beautiful risk game. It is a new non-commercial project using pure HTML5 and websockets to realize a realtime interaction between multiple players. No flash required.
