Bitrix has modules for donor management, volunteer management, tasks and projects, communications, collaboration, document management, and Human Resources.

The donor management modules offers a centralized space to store donor records, it also lets you note all interactions with your donors. The donor management module also can be used to project and plan future interactions with donors and stay abreast of progress towards goals.

With the Bitrix volunteer management module you can connect with your volunteers via messaging, chat or video. It has a calendar feature that lets you track your events and volunteer availability.

The HR module offers everything you need to track your employees time and store sensitive employee records.

Bitrix offers tiered pricing with a free version that offers access for up to 12 users and 5GB of online storage. Prices increase with the number of users and amount of online storage your organization requires. In addition to the cloud version they do offer a self hosted version.