Modern genetic approaches are powerful in providing access to diverse cell types in the brain and facilitating the study of their function. Here, we report a large set of driver and reporter transgenic mouse lines, including 23 new driver lines targeting a variety of cortical and subcortical cell populations and 26 new reporter lines expressing an array of molecular tools. In particular, we describe the TIGRE2.0 transgenic platform and introduce Cre-dependent reporter lines that enable optical physiology, optogenetics, and sparse labeling of genetically defined cell populations. TIGRE2.0 reporters broke the barrier in transgene expression level of single-copy targeted-insertion transgenesis in a wide range of neuronal types, along with additional advantage of a simplified breeding strategy compared to our first-generation TIGRE lines. These novel transgenic lines greatly expand the repertoire of high-precision genetic tools available to effectively identify, monitor, and manipulate distinct cell types in the mouse brain. Display omitted •23 new driver lines and 26 new reporter lines for a wide range of applications•TIGRE2.0 reporters have viral-like transgene expression level in diverse cell types•New calcium- or voltage-sensing reporters with the former functionally characterized•Comparative analysis of new optogenetic effectors with complementary properties An expanded toolkit of transgenic mouse lines for exploring the organization, function, and development of mammalian neural circuits.