https://www.toneboosters.com/tb_goniometer_v1.html
https://www.toneboosters.com/tb_spectrogram_v1.html

Kompose Audio have released Rise, available for $6.00. Add any Kompose Audio product to your cart, then add Rise, your copy of Rise will be FREE!!

Get ready to dive into instant ambient soundscapes with the Fusion Collection for Soundbox.
Rise

https://www.tracktion.com/products/horizen#specs
Tracktion have updated Horizon, to ver 2.6 currently available for $90.00, (usually $149.00).
with new Expansions
Tag based search and retrieve for sounds and presets.
Scalable vector interface
six brand-new and inspiring FX
Tempo-synced options for effects, arpeggiators, and LFOs have been…Read More

https://sampleson.com/tronic.html
Sampleson have reduced the price of Tronic, now only $29.00, (usually $49.00). You’ll also receive a FREE copy of Brushify (valued at $59.00) with yout purchase. The offer ends January 10th.
Tronic is a generative analog drum synthesizer that creates rich, hypnotic, and party-pumping beats with just one c…Read More

https://imagi.ro/product/shearwater
shearwater piano is an intimate upright piano recorded in Dartmoor, UK.
use tape mode for an instant vintage warmth, with every note run individually through a tape deck.
or, use paper mode for a unique plucky bounce, recorded with masking tape over the piano strings.
40$