ViBel is a HyperGrid enabled virtual worlds network. The platform is based on BSD licensed software provided by the OpenSimulator Project since it was founded in January 2007. It was initially open sourced by Linden Lab to crowdsource code contributions for its virtual world called Second Life.
On average, software updates are released weekly by the OpenSimulator Project Dev Team. The current release of ViBel is version 0.9.0.1 of June 30th 2018 (which is the exactly the same as Development version 0.9.1 on OpenSimulator GitHub https branch per June 30th 2018).
The server concept of Vibel provides an open simulator network (Grid), in which the individual Simulators (SIMs, local OpenSim installations) can connect to the central grid server. Technically, an OpenSim grid consists of a variety of individual, distributed OpenSim installations. ViBel also hosts its own SIMs, including the region of "Neiferleaf" as the central meeting point and touchdown at the ViBel Grid.
A part of these regions is also offered as rental regions at an attractive price of € 10.00 per month/sim-equivalent.
The combination of the ViBel mainland and locally hosted regions creates a cluster of interconnected virtual worlds. The avatar can move freely through these distributed worlds, as if they were installed on one single computer.
Furthermore, avatars (users) can not only teleport between regions connected to ViBel, everyone can visit other foreign virtual worlds (Grids), such as Metropolis (DE), LogiCamp (FR-BE), Francogrid (FR), etc. with ViBel's HyperGrid functionality. The Avatar will keep his complete inventory on his journey and he is also able to collect items (freebies) from the foreign Grid.
There are more information about the simulator installation and grid connection here.
Informations about the rent of ViBel regions can be found here.
More informations about the Hypergrid (teleporting between grids) can be found here.