The keys are free, VS 2019 included

 

Here are free keys (except for Windows):

VS 2019 Enterprise and professional:

• BF8Y8-GN2QH-T84XB-QVY3B-RC4DF
• NYWVH-HT4XC-R2WYW-9Y3CM-X4V3Y

 

VS 2017:

• VG622-NKFP4-GTWPH-XB2JJ-JFHVF
• KBJFW-NXHK6-W4WJM-CRMQB-G3CDH
• 4F3PR-NFKDB-8HFP7-9WXGY-K77T7
• NJVYC-BMHX2-G77MM-4XJMR-6Q8QF
• N2VYX-9VR2K-T733M-MWD9X-KQCDF

 

VS 2015:

• HMGNV-WCYXV-X7G9W-YCX63-B98R2
• HM6NR-QXX7C-DFW2Y-8B82K-WTYJV
• 2XNFG-KFHR8-QV3CP-3W6HT-683CH
• PTBNK-HVGCM-HB2GW-MXWMH-T3BJQ

 

VS 2013:

• XDM3T-W3T3V-MGJWK-8BFVD-GVPKY
• FBJVC-3CMTX-D8DVP-RTQCT-92494
• BWG7X-J98B3-W34RT-33B3R-JVYW9

 

VS 2012:

• 4D974-9QX42-9Y43G-YJ7JG-JDYBP
• MH2FR-BC9R2-84433-47M63-KQVWC
• YKCW6-BPFPF-BT8C9-7DCTH-QXGWC
• RBCXF-CVBGR-382MK-DFHJ4-C69G8
• YQ7PR-QTHDM-HCBCV-9GKGG-TB2TM
• MMVJ9-FKY74-W449Y-RB79G-8GJGJ
• YCFHQ-9DWCY-DKV88-T2TMH-G7BHP

 

VS 2010:

• YCFHQ-9DWCY-DKV88-T2TMH-G7BHP

 

VS 2008:

• XMQ2Y-4T3V6-XJ48Y-D3K2V-6C4WT
• WPX3J-BXC3W-BPYWP-PJ8CM-F7M8T
• PYHYP-WXB3B-B2CCM-V9DX9-VDY8T
• WPDW8-M962C-VJX9M-HQB4Q-JVTDM