8Dio "Deep Quintet Strings" string library with 9-way Round Robin legato featuring two Violins, one Viola and two Cellos for Kontakt - Intro Price ($150) for limited time : r/AudioProductionDeals
MusicalSampling SOARING-STRINGS Legato String Instrument Sample Library [download] | Full Compass Systems
The best virtual instruments: 12 of the best string libraries and instruments