A modernized derivative of the Albatros, the L-59, is still being built in the Czech Republic. Another modernized, but very different version, the L-39MS, actually has much more in common with the L-59 than the L-39, despite its designation.

As of this writing, the L-39 is the most popular jet warbird in the world, with over 300 believed to be actively flying in the USA alone

Specifications:

Engine: One 3,792-lb thrust Walter Titan turbofan (Ivchenko AI-25-TL built under Czech license by Motorlet).
Weight: Empty 7,340 lbs., Max Takeoff 11,618 lbs. (L-39ZO with four rocket pods)
Wing Span: 31ft. 0.5in.
Length: 40ft. 5in.
Height: 15ft. 5.5in.

Performance:

Maximum Speed at 19,600 ft: 485 mph (Trainer version, clean)
Maximum Speed at Sea Level: 435 mph
Ceiling: 37,730 ft. (Trainer, clean)
Range: 528 miles with internal fuel; 995 miles with external tanks.
Armament: (L-39ZO): Up to 2,425 pounds of weapons on four underwing hardpoints, including bombs, 57- or 130-mm rocket pods, gun pods, a five-camera reconnaissance pod, or two fuel drop-tanks. Centerline point carried a pod-mounted 23-mm twin-barrel GSh-23 cannon with 180 rounds.
Number Built: 2800+