I will present the latest tomographic cosmic shear measurements from the Kilo Degree Survey (KiDS), and the resulting cosmological parameter constraints. I will explore the sensitivity of the parameter constraints to the systematic uncertainties and improvements that come from incorporating overlapping near-infrared data from VIKING. I will discuss the combined analysis of weak lensing tomography and overlapping redshift-space galaxy clustering from KiDS and the spectroscopic surveys of 2dFLenS, BOSS, and GAMA, with a focus on improvements to systematics mitigation and parameter constraints in standard and extended cosmologies. I will compare these parameter constraints to those obtained from the Dark Energy Survey (DES) and the Hyper Suprime-Cam (HSC) Survey, and will assess their concordance with the Planck cosmic microwave background. In the case of KiDS and DES, I will also discuss the improvements that result from a combined analysis of the two datasets.