Winterware or better known as Crystalware Reloaded is a paid client created by the well-known Uncodable in YouTube. One of the first intentions of Crystalware Reloaded was to be an improved version of its predecessor client "Crystalware" which was intended to be a dedicated client only for VeltPvP.
This client became very popular mainly due to the large number of disablers it had, an example could be AntiGamingChair, but mostly it was due to the disabler called "Flash2" that disabled Verus (Anticheat which became very popular in these moments). Unfortunately, the client's developer announced the discontinuation of this, along with its sale, so getting it became more and more complicated, to finish, people ended up filtering most of the versions but by then the client had become practically useless and out of date. The creator wanted since its discontinuation that the client died but his community continues to prevent that for almost 1 year by uploading videos on YouTube
Client Creator/Developer Channel: https://www.youtube.com/channel/UCqvBfGWP9DOI22ZSiIzH7NA