Executor - Executor a windows launcher
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Enso Launcher - Enso is dead simple to use.
Advanced Run - Advanced Run is a replacement for a standard Windows Run dialog.
Gnome Do - Simple, sleek, swift, smart. Do. GNOME Do allows you to quickly search for many items present on your desktop or the web, and perform useful actions on those items. GNOME Do is inspired by Quicksilver & GNOME Launch Box.
SlickRun - SlickRun is a free floating command line utility for Windows.