There are multiple third-party frontends that leverage the Safe contracts and/or infrastructure. Some of them are listed below.
{% embed url="https://multisafe.finance" %}
{% embed url="https://Parcel.money" %}
{% embed url="https://trysmartdefi.com" %}
{% embed url="https://Linen.app" %}
{% embed url="https://radicle.xyz" %}
{% embed url="https://circles.garden" %}
{% embed url="https://multis.co" %}
{% embed url="https://staker.app" %}