We report the demonstration of a gain-saturated $10.9\mathrm{nm}$ tabletop soft x-ray laser operating at $1\mathrm{Hz}$ repetition rate. Lasing occurs by collisional electron impact excitation in the $4d{}^{1}S_0\to 4p{}^{1}P_1$ transition of nickel-like Te in a line-focus plasma heated by a chirped-pulse-amplification Ti:sapphire laser. With an average power of $1\mu \text{W}$ and pulse energy up to $\sim 2\mu \text{J}$ , this laser extends the ability to conduct tabletop laser experiments to a shorter wavelength.