The ρ (Rho) Theme is a very customizable grid theme that is aesthetically pleasing. It has a header link that opens a pop-up window. This is the most customizable theme I have made! It has many choices and up to four custom links.
The Φ (Phi) Theme is a 250px two column grid theme that is clean and very functional. It has a unique header along with simple header links that are customizable. It has many color choices and four custom links.
The Θ (Theta) Theme is a 400px one column grid theme that is very customizable. It has cool links, hover titles, image fade, and standard permalinks. It also includes up to two custom links.
The ζ (Zeta) Theme is a 300px one column grid theme that is very simple and modern. It sports a diamond sidebar along with cool like/reblog/notes permalinks. It has color choices and up to three custom links.
The Ω (Omega) theme is a 300px one column grid theme that is very simple. It sports a unique sidebar, bordered photos, and standard permalinks. It also includes many color choices and up to three custom links.