This year (2018) the following 10 tools where the most useful and/or helpful ones for me:

10. iSmoothRun

8. Twitterrific

7. Working Copy

6. VMware Fusion Pro

5. Bitbucket Server

  • Vendor URL: https://www.atlassian.com/
  • Purpose: Git server
  • Supported OS for server: Linux and (not recommended) MacOS and Windows
  • Supported OS for clients: any that has a Git client or browser

4. HipChat Server

  • Vendor URL: https://www.atlassian.com/
  • Purpose: Chat server
  • Supported OS for server: Vendor provided virtual appliance based on Linux
  • Supported OS for clients: MacOS, Windows, Linux, iOS, Android, browsers

3. Confluence Server

  • Vendor URL: https://www.atlassian.com/
  • Purpose: Wiki server
  • Supported OS for server: Linux and (not recommended) MacOS and Windows
  • Supported OS for clients: nay that has a browser

2. Royal TS(X)

  • URL: https://www.royalapps.com/
  • Purpose: client for SSH, RDP, VNC, … including password manager
  • Supported OS: MacOS (Royal TSX), Windows (Royal TS), iOS with restrictions (Royal TSi)

1. Zoom

  • URL: https://zoom.us
  • Purpose: service for video conferences, webinars, screensharing and chat collaboration
  • Supported OS: MacOS, Windows, Linux, iOS, Android

I do not include browser(s) and mail though I used them a lot, but they are too common to mention here.