Top 4 C# Vault Projects

TQVaultAE

9 269 5.2 C#

Extra bank space for Titan Quest Anniversary Edition
SecureFolderFS

1 164 8.0 C#

Powerful, secure, modern way to keep your files protected.

Project mention: How i can Windows 11 file block | /r/Windows11 | 2023-05-26

I think you should take a look at SecureFolderFS

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Stratio.Extensions.Configuration.Vault

0 22 7.1 C#

Simplifying Secrets Management in .NET using Hashicorp Vault (powered by Stratio)
NVault

1 4 7.5 C#

A self-hosted, multi-user, nostr credential vault, with cross-browser NIP-07 extension

Project mention: Today I'm launching Flare, a video sharing site built on Nostr Like YouTube | news.ycombinator.com | 2023-12-21

I am glad Zach posted here also, I think nostr devs need some reality pull from "non-crypto normies". To be clear it is (hopefully) becoming more common practice to use a nip-07 web-extension for signing (hardware or software) or other methods such as NIP-46. To be clear though, a user on nostr will HAVE to interact with cryptography in some way as every message on the network is signed.
Im working on https://github.com/VnUgE/NVault as an option for more paranoid users that want a self hosted networked approach. But there are others listed here https://github.com/nostr-protocol/nips/blob/master/07.md
Finally, I wholly dislike the practice of offering an option of entering an nsec. Use a signing extension!

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).