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Publisher · Freeware

Heiko Sommerfeldt

Heiko Sommerfeldt is the author of the Windows softphones PhonerLite (SIP) and Phoner (SIP, CAPI and TAPI). Both are distributed as closed-source freeware that may be used free of charge in private and business environments.

Licensing at a Glance

  • Freeware

  1. PhonerLite is freeware and can be used, copied and redistributed free of charge in private and business environments; it is not open source.[1]

  2. The PhonerLite licence permits use for any purpose, including commercial applications, provided copyright notices are retained and modified versions are plainly marked as such.[2]

  3. All distributions of PhonerLite must remain free of charge; commercial distribution requires further inquiry to the author.[3]

  4. Phoner is freeware that can be used in private and commercial environments and distributed for free; it is not open source.[4]

  5. Phoner is no longer being developed, and users are directed to PhonerLite instead.[5]

Products

References

  1. PhonerLite: Free SIP Softphone for Windows · lite.phoner.de · retrieved 2026-09-27
  2. PhonerLite: License · lite.phoner.de · retrieved 2026-09-27
  3. PhonerLite: License · lite.phoner.de · retrieved 2026-09-27
  4. Phoner English · phoner.de · retrieved 2026-09-27
  5. Phoner English · phoner.de · retrieved 2026-09-27
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