<div class="mt-2 h4">Alf.io is a free and open source event attendance management system, developed for event organizers who care about privacy, security and fair pricing policy for their customers. It features an ecosystem of tools to cover the lifecycle of an event from ticket distribution, to event management, to reporting.</div>
<div class="mt-2 h4">&nbsp;</div>
<div class="mt-2 h4">The GUI is currently available in Italian, English, Spanish, German, Dutch, French, Turkish, Romanian and Portuguese. It supports <a href="https://stripe.com/" target="_blank" rel="noopener">Stripe</a> and <a href="https://mollie.com" target="_blank" rel="noopener">Mollie</a> as gateways for payments done by credit card.</div>

Alf.io is a free and open source event attendance management system, developed for event organizers who care about privacy, security and fair pricing policy for their customers.

Alf.io - The open source ticket reservation system

Apache Mnemonic is a non-volatile hybrid memory storage oriented library, it proposed a non-volatile/durable Java object model and durable computing service that bring several advantages to significantly improve the performance of massive real-time data processing/analytics. developers are able to use this library to design their cache-less and SerDe-less high performance applications.
<ul>
<li>In-place data storage on local non-volatile memory</li>
<li>Durable Object Model (DOM)</li>
<li>Durable Native Computing Model (DNCM)</li>
<li>Object graphs lazy loading &amp; sharing</li>
<li>Auto-reclaim memory resources and Mnemonic objects</li>
<li>Hierarchical cache pool for massive data caching</li>
<li>Extensible memory services for new device adoption and allocation optimization</li>
<li>Durable data structure collection(WIP)</li>
<li>Durable computing service</li>
<li>Minimize memory footprint of on-heap</li>
<li>Reduce GC Overheads as the following chart shown (collected from Apache Spark experiments)</li>
<li>Drop-in Hadoop MapReduce support</li>
<li>Drop-in Hadoop Spark support</li>
</ul>

Apache Mnemonic is a non-volatile hybrid memory storage oriented library, it proposed a non-volatile/durable Java object model and durable computing service that bring several advantages to significantly improve the performance of massive real-time data processing/analytics. developers are able to use this library to design their cache-less and SerDe-less high performance applications.

Apache Mnemonic -  Non-volatile hybrid memory storage oriented library

cache2k focuses on providing a well engineered in-memory object cache implementation for Java applications. It has fastest access times, due to non blocking and wait free access of cached values. It is thread safe, with a complete set of atomic operations. It supports automatic expiry and refresh: duration or point in time, variable expiry per entry, delta calculations.

Cache2k –  Lightweight, high performance Java caching 

Trino is a highly parallel and distributed query engine, that is built from the ground up for efficient, low latency analytics. It is an ANSI SQL compliant query engine, that works with BI tools such as R, Tableau, Power BI, Superset and many others. It helps to natively query data in Hadoop, S3, Cassandra, MySQL, and many others, without the need for complex, slow, and error-prone processes for copying the data. 
<BR><BR>
Access data from multiple systems within a single query. For example, join historic log data stored in an S3 object storage with customer data stored in a MySQL relational database.

Trino is a highly parallel and distributed query engine, that is built from the ground up for efficient, low latency analytics. It is an ANSI SQL compliant query engine, that works with BI tools such as R, Tableau, Power BI, Superset and many others. It helps to natively query data in Hadoop, S3, Cassandra, MySQL, and many others, without the need for complex, slow, and error-prone processes for copying the data. 

Trino - A query engine that runs at ludicrous speed

TypeDB is a strongly-typed database with a rich and logical type system. TypeDB empowers you to tackle complex problems, and TypeQL is its query language. TypeDB allows you to model your domain based on logical and object-oriented principles. Composed of entity, relationship, and attribute types, as well as type hierarchies, roles, and rules, TypeDB allows you to think higher-level as opposed to join-tables, columns, documents, vertices, edges, and properties.
<BR><BR>
TypeDB allows you to model your domain using the well-known Entity-Relationship model. It is composed of entity types, relation types, and attribute types, with the introduction of role types. TypeDB allows you to leverage the full expressivity of the ER model, and describe your schema through first normal form.
<BR><BR>
Types provide a way to describe the logical structures of your data, allowing TypeDB to validate that your code inserts and queries data correctly. Query validation goes beyond static type-checking, and includes logical validation of meaningless queries. With strict type-checking errors, you have a dataset that you can trust.
<BR><BR>
TypeDB encodes your data for logical interpretation by a reasoning engine. It enables type-inference and rule-inference, which create logical abstractions of data. This allows the discovery of facts and patterns that would otherwise be too hard to find; and complex queries become much simpler.
<BR><BR>
TypeDB's API is provided through a gRPC client, providing bi-directional streaming, compression, and strong message typing, that REST APIs could not provide. TypeDB Clients are delivered as libraries in dedicated languages that provide stateful objects, Session and Transactions, for you to interact with the database programmatically.

TypeDB is a strongly-typed database with a rich and logical type system. TypeDB empowers you to tackle complex problems, and TypeQL is its query language. TypeDB allows you to model your domain based on logical and object-oriented principles. Composed of entity, relationship, and attribute types, as well as type hierarchies, roles, and rules, TypeDB allows you to think higher-level as opposed to join-tables, columns, documents, vertices, edges, and properties.

TypeDB - A strongly-typed database

Yasson is a Java framework which provides a standard binding layer between Java classes and JSON documents. This is similar to what JAXB is doing in the XML world. Yasson is an official reference implementation of JSON Binding. It defines a default mapping algorithm for converting existing Java classes to JSON suitable for the most cases.

Yasson -  An official reference implementation of JSON Binding

Robolectric is the industry-standard unit testing framework for Android. With Robolectric, your tests run in a simulated Android environment inside a JVM, without the overhead and flakiness of an emulator. Robolectric tests routinely run 10x faster than those on cold-started emulators. Robolectric supports running unit tests for 16 different versions of Android, ranging from Jelly Bean (API level 16) to SV2 (API level 32).
<BR><BR>
Unlike traditional emulator-based Android tests, Robolectric tests run inside a sandbox which allows the Android environment to be precisely configured to the desired conditions for each test, isolates each test from its neighbors, and extends the Android framework with test APIs which provide minute control over the Android framework’s behavior and visibility of state for assertions.

Robolectric is the industry-standard unit testing framework for Android. With Robolectric, your tests run in a simulated Android environment inside a JVM, without the overhead and flakiness of an emulator. Robolectric tests routinely run 10x faster than those on cold-started emulators. Robolectric supports running unit tests for 16 different versions of Android, ranging from Jelly Bean (API level 16) to SV2 (API level 32).

Robolectric - Android Unit Testing Framework

LinShare is an Open Source secure file sharing application intended to cover your business security and file transfer needs. It provides support to collaborate and transfer very big files (more than 100Gb). It is self-hosted and you have control over your data. Share files among your teams, save contact lists, create deposits to allow your external contacts to upload files, and more.

LinShare - Open Source Secure Files Sharing

SCOUTER is an open source APM like new relic and appdynamics. (APM means Application Performance Monitoring or Application Performance Management.) SCOUTER shows metrics about Users (Active user, Recently used user, Today visitor), Services ( Active service, TPS, Response time, Application profiles(method profile, sql profile, external call profile etc) and Resources (Cpu, Memory, Network and Heap usage, Connection pools etc).   


    

SCOUTER - APM (Application Performance Management) tool.

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Projects

Alf.io - The open source ticket reservation system

Apache Mnemonic - Non-volatile hybrid memory storage oriented library

Cache2k – Lightweight, high performance Java caching

Trino - A query engine that runs at ludicrous speed

TypeDB - A strongly-typed database

Yasson - An official reference implementation of JSON Binding

Robolectric - Android Unit Testing Framework

LinShare - Open Source Secure Files Sharing

SCOUTER - APM (Application Performance Management) tool.

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